./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/down.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/down.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:04:01,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:04:01,153 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:04:01,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:04:01,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:04:01,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:04:01,190 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:04:01,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:04:01,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:04:01,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:04:01,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:04:01,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:04:01,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:04:01,200 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:04:01,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:04:01,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:04:01,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:04:01,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:04:01,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:04:01,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:04:01,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:04:01,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:04:01,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:04:01,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:04:01,220 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:04:01,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:04:01,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:04:01,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:04:01,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:04:01,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:04:01,226 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:04:01,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:04:01,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:04:01,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:04:01,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:04:01,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:04:01,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:04:01,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:04:01,229 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:04:01,230 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:04:01,231 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:04:01,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:04:01,251 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:04:01,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:04:01,252 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:04:01,252 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:04:01,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:04:01,253 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:04:01,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:04:01,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:04:01,255 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:04:01,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:04:01,255 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:04:01,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:04:01,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:04:01,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:04:01,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:04:01,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:04:01,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:04:01,256 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:04:01,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:04:01,257 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:04:01,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:04:01,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:04:01,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:04:01,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:04:01,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:04:01,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:04:01,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:04:01,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:04:01,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:04:01,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:04:01,258 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:04:01,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:04:01,259 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:04:01,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:04:01,259 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:04:01,259 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d487f6cb836d5c7294168f7ececc6a4515780c0860389f79570a9c0e20e7bcc0 [2023-02-15 11:04:01,508 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:04:01,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:04:01,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:04:01,527 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:04:01,527 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:04:01,528 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/down.i [2023-02-15 11:04:02,602 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:04:02,756 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:04:02,756 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/down.i [2023-02-15 11:04:02,761 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d30f71c20/6d8fb09d82ea4f51813eb1f14030eaad/FLAG6a840f3e6 [2023-02-15 11:04:02,772 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d30f71c20/6d8fb09d82ea4f51813eb1f14030eaad [2023-02-15 11:04:02,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:04:02,776 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:04:02,777 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:04:02,777 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:04:02,781 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:04:02,781 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:02,784 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df974d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02, skipping insertion in model container [2023-02-15 11:04:02,784 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:02,791 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:04:02,808 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:04:02,947 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/down.i[893,906] [2023-02-15 11:04:02,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:04:02,968 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:04:02,978 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/down.i[893,906] [2023-02-15 11:04:02,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:04:02,990 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:04:02,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02 WrapperNode [2023-02-15 11:04:02,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:04:02,991 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:04:02,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:04:02,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:04:02,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,001 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,015 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 45 [2023-02-15 11:04:03,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:04:03,016 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:04:03,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:04:03,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:04:03,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,041 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:04:03,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:04:03,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:04:03,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:04:03,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (1/1) ... [2023-02-15 11:04:03,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:04:03,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:03,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 11:04:03,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 11:04:03,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:04:03,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:04:03,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:04:03,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:04:03,154 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:04:03,156 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:04:03,248 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:04:03,252 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:04:03,253 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 11:04:03,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:04:03 BoogieIcfgContainer [2023-02-15 11:04:03,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:04:03,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:04:03,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:04:03,259 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:04:03,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:04:02" (1/3) ... [2023-02-15 11:04:03,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8a3b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:04:03, skipping insertion in model container [2023-02-15 11:04:03,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:04:02" (2/3) ... [2023-02-15 11:04:03,261 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b8a3b80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:04:03, skipping insertion in model container [2023-02-15 11:04:03,261 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:04:03" (3/3) ... [2023-02-15 11:04:03,262 INFO L112 eAbstractionObserver]: Analyzing ICFG down.i [2023-02-15 11:04:03,277 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:04:03,277 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:04:03,328 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:04:03,336 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@165d18ec, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:04:03,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:04:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:04:03,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:03,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:03,358 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:03,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:03,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1808851121, now seen corresponding path program 1 times [2023-02-15 11:04:03,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:03,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768568619] [2023-02-15 11:04:03,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:03,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:03,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:03,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768568619] [2023-02-15 11:04:03,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768568619] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:04:03,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:04:03,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 11:04:03,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377252613] [2023-02-15 11:04:03,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:04:03,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:04:03,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:03,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:04:03,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 11:04:03,677 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:03,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:03,778 INFO L93 Difference]: Finished difference Result 30 states and 39 transitions. [2023-02-15 11:04:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:04:03,780 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 11:04:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:03,786 INFO L225 Difference]: With dead ends: 30 [2023-02-15 11:04:03,787 INFO L226 Difference]: Without dead ends: 10 [2023-02-15 11:04:03,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:04:03,794 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:03,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 35 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-15 11:04:03,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-15 11:04:03,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:03,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-15 11:04:03,821 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2023-02-15 11:04:03,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:03,822 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-15 11:04:03,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:03,822 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-15 11:04:03,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 11:04:03,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:03,823 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:03,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 11:04:03,823 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:03,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:03,824 INFO L85 PathProgramCache]: Analyzing trace with hash 291256044, now seen corresponding path program 1 times [2023-02-15 11:04:03,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:03,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717164508] [2023-02-15 11:04:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:03,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:03,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:03,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717164508] [2023-02-15 11:04:03,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717164508] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:03,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631007061] [2023-02-15 11:04:03,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:03,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:03,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:03,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:03,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 11:04:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:03,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 11:04:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:04,083 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:04:04,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631007061] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:04:04,083 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:04:04,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-02-15 11:04:04,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647990476] [2023-02-15 11:04:04,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:04:04,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 11:04:04,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:04,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 11:04:04,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:04:04,086 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:04,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:04,115 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2023-02-15 11:04:04,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:04:04,116 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 11:04:04,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:04,116 INFO L225 Difference]: With dead ends: 20 [2023-02-15 11:04:04,117 INFO L226 Difference]: Without dead ends: 18 [2023-02-15 11:04:04,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:04:04,118 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:04,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-15 11:04:04,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 12. [2023-02-15 11:04:04,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-02-15 11:04:04,122 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-02-15 11:04:04,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:04,122 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-02-15 11:04:04,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:04,123 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-02-15 11:04:04,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 11:04:04,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:04,124 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:04,133 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:04,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:04,330 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:04,330 INFO L85 PathProgramCache]: Analyzing trace with hash 979689165, now seen corresponding path program 1 times [2023-02-15 11:04:04,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:04,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648341973] [2023-02-15 11:04:04,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:04,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:04,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:04,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648341973] [2023-02-15 11:04:04,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648341973] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:04,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466651791] [2023-02-15 11:04:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:04,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:04,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:04,425 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:04,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 11:04:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:04,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 11:04:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:04,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:04,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:04,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466651791] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:04,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:04,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 8 [2023-02-15 11:04:04,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419929910] [2023-02-15 11:04:04,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:04,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 11:04:04,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:04,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 11:04:04,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:04:04,534 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:04,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:04,576 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2023-02-15 11:04:04,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-15 11:04:04,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 11:04:04,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:04,577 INFO L225 Difference]: With dead ends: 23 [2023-02-15 11:04:04,577 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 11:04:04,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-15 11:04:04,579 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:04,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:04,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 11:04:04,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-02-15 11:04:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-02-15 11:04:04,583 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-02-15 11:04:04,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:04,583 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-02-15 11:04:04,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-02-15 11:04:04,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 11:04:04,584 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:04,584 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:04,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:04,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-15 11:04:04,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:04,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash -510353528, now seen corresponding path program 2 times [2023-02-15 11:04:04,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:04,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3600608] [2023-02-15 11:04:04,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:04,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:04,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:04,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3600608] [2023-02-15 11:04:04,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3600608] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:04,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18837688] [2023-02-15 11:04:04,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:04:04,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:04,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:04,902 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:04,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 11:04:04,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:04:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 11:04:04,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:05,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:05,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:05,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18837688] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:05,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:05,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2023-02-15 11:04:05,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380965110] [2023-02-15 11:04:05,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:05,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 11:04:05,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:05,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 11:04:05,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-02-15 11:04:05,057 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:05,116 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-02-15 11:04:05,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 11:04:05,116 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-15 11:04:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:05,117 INFO L225 Difference]: With dead ends: 24 [2023-02-15 11:04:05,117 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 11:04:05,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:04:05,119 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:05,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 24 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 11:04:05,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 16. [2023-02-15 11:04:05,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:05,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-02-15 11:04:05,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2023-02-15 11:04:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:05,127 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-02-15 11:04:05,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:05,128 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-02-15 11:04:05,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-15 11:04:05,128 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:05,128 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:05,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:05,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:05,333 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:05,334 INFO L85 PathProgramCache]: Analyzing trace with hash 247095473, now seen corresponding path program 3 times [2023-02-15 11:04:05,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:05,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884854807] [2023-02-15 11:04:05,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:05,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:05,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:05,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:05,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884854807] [2023-02-15 11:04:05,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884854807] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:05,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040361147] [2023-02-15 11:04:05,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:04:05,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:05,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:05,452 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:05,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 11:04:05,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-15 11:04:05,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:05,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 11:04:05,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:05,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:05,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040361147] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:05,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:05,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 10 [2023-02-15 11:04:05,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196123966] [2023-02-15 11:04:05,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:05,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:04:05,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:05,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:04:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:04:05,578 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:05,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:05,638 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-02-15 11:04:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-15 11:04:05,638 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-02-15 11:04:05,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:05,639 INFO L225 Difference]: With dead ends: 30 [2023-02-15 11:04:05,639 INFO L226 Difference]: Without dead ends: 17 [2023-02-15 11:04:05,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:04:05,640 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:05,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 37 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:05,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-15 11:04:05,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-15 11:04:05,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-02-15 11:04:05,648 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2023-02-15 11:04:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:05,649 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-02-15 11:04:05,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-02-15 11:04:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 11:04:05,650 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:05,650 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:05,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:05,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:05,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash 576015340, now seen corresponding path program 4 times [2023-02-15 11:04:05,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:05,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464671599] [2023-02-15 11:04:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:05,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:05,983 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:05,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:05,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464671599] [2023-02-15 11:04:05,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464671599] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:05,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193522946] [2023-02-15 11:04:05,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:04:05,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:05,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:05,989 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:06,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 11:04:06,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:04:06,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:06,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 11:04:06,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:06,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:06,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:06,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193522946] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:06,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:06,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2023-02-15 11:04:06,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686440897] [2023-02-15 11:04:06,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:06,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 11:04:06,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:06,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 11:04:06,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:04:06,113 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:06,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:06,180 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2023-02-15 11:04:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 11:04:06,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 11:04:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:06,182 INFO L225 Difference]: With dead ends: 28 [2023-02-15 11:04:06,182 INFO L226 Difference]: Without dead ends: 26 [2023-02-15 11:04:06,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:04:06,183 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:06,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 30 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:06,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-15 11:04:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2023-02-15 11:04:06,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:06,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-02-15 11:04:06,187 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2023-02-15 11:04:06,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:06,188 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-02-15 11:04:06,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:06,188 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-02-15 11:04:06,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 11:04:06,188 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:06,188 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:06,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:06,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:06,394 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:06,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:06,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1683466701, now seen corresponding path program 5 times [2023-02-15 11:04:06,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:06,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127183150] [2023-02-15 11:04:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:06,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:06,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:06,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127183150] [2023-02-15 11:04:06,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127183150] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:06,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956480217] [2023-02-15 11:04:06,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:04:06,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:06,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:06,533 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:06,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 11:04:06,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-15 11:04:06,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:06,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 11:04:06,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:06,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:06,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956480217] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:06,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:06,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 12 [2023-02-15 11:04:06,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176581629] [2023-02-15 11:04:06,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:06,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 11:04:06,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:06,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 11:04:06,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:04:06,681 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:06,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:06,744 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-02-15 11:04:06,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 11:04:06,745 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 11:04:06,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:06,746 INFO L225 Difference]: With dead ends: 37 [2023-02-15 11:04:06,747 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 11:04:06,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-02-15 11:04:06,748 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:06,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 37 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 11:04:06,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-15 11:04:06,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:06,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-02-15 11:04:06,757 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2023-02-15 11:04:06,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:06,757 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-02-15 11:04:06,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:06,758 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-02-15 11:04:06,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-15 11:04:06,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:06,759 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:06,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:06,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:06,963 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:06,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash 230981512, now seen corresponding path program 6 times [2023-02-15 11:04:06,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:06,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117263247] [2023-02-15 11:04:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:06,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:06,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:07,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:07,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117263247] [2023-02-15 11:04:07,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117263247] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:07,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096678820] [2023-02-15 11:04:07,056 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:04:07,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:07,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:07,058 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:07,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 11:04:07,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-15 11:04:07,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:07,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 11:04:07,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:07,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:07,181 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:07,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096678820] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:07,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:07,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2023-02-15 11:04:07,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649331587] [2023-02-15 11:04:07,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:07,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 11:04:07,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:07,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 11:04:07,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2023-02-15 11:04:07,183 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:07,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:07,250 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2023-02-15 11:04:07,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 11:04:07,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-15 11:04:07,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:07,251 INFO L225 Difference]: With dead ends: 32 [2023-02-15 11:04:07,251 INFO L226 Difference]: Without dead ends: 30 [2023-02-15 11:04:07,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-02-15 11:04:07,252 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:07,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:07,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-02-15 11:04:07,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2023-02-15 11:04:07,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:07,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-02-15 11:04:07,257 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2023-02-15 11:04:07,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:07,257 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-02-15 11:04:07,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:07,258 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-02-15 11:04:07,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-15 11:04:07,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:07,258 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:07,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:07,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:07,464 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:07,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:07,464 INFO L85 PathProgramCache]: Analyzing trace with hash 637436081, now seen corresponding path program 7 times [2023-02-15 11:04:07,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:07,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995923077] [2023-02-15 11:04:07,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:07,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:07,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:07,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995923077] [2023-02-15 11:04:07,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995923077] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:07,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955925576] [2023-02-15 11:04:07,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:04:07,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:07,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:07,585 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:07,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 11:04:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:07,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 11:04:07,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:07,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:07,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955925576] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:07,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:07,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 14 [2023-02-15 11:04:07,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256456760] [2023-02-15 11:04:07,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:07,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 11:04:07,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:07,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 11:04:07,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:04:07,762 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:07,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:07,844 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-15 11:04:07,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-15 11:04:07,844 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-15 11:04:07,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:07,845 INFO L225 Difference]: With dead ends: 44 [2023-02-15 11:04:07,845 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 11:04:07,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:04:07,846 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:07,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 53 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:07,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 11:04:07,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-15 11:04:07,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:07,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-02-15 11:04:07,850 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2023-02-15 11:04:07,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:07,850 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-02-15 11:04:07,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:07,851 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-02-15 11:04:07,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-15 11:04:07,851 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:07,851 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:07,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 11:04:08,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-02-15 11:04:08,057 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:08,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:08,058 INFO L85 PathProgramCache]: Analyzing trace with hash -45874964, now seen corresponding path program 8 times [2023-02-15 11:04:08,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:08,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270866735] [2023-02-15 11:04:08,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:08,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:08,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270866735] [2023-02-15 11:04:08,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270866735] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:08,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089424801] [2023-02-15 11:04:08,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:04:08,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:08,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:08,163 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:08,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 11:04:08,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:04:08,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:08,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 11:04:08,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:08,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:08,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089424801] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:08,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:08,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2023-02-15 11:04:08,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269440061] [2023-02-15 11:04:08,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:08,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 11:04:08,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:08,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 11:04:08,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-15 11:04:08,344 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:08,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:08,421 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-02-15 11:04:08,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 11:04:08,421 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-15 11:04:08,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:08,423 INFO L225 Difference]: With dead ends: 36 [2023-02-15 11:04:08,423 INFO L226 Difference]: Without dead ends: 34 [2023-02-15 11:04:08,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2023-02-15 11:04:08,424 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:08,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 28 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:08,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-15 11:04:08,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2023-02-15 11:04:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:08,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2023-02-15 11:04:08,431 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2023-02-15 11:04:08,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:08,432 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2023-02-15 11:04:08,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:08,432 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2023-02-15 11:04:08,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-15 11:04:08,432 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:08,433 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:08,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:08,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 11:04:08,638 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:08,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:08,639 INFO L85 PathProgramCache]: Analyzing trace with hash -856632115, now seen corresponding path program 9 times [2023-02-15 11:04:08,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:08,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323712139] [2023-02-15 11:04:08,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:08,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:08,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:08,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323712139] [2023-02-15 11:04:08,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323712139] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:08,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930647507] [2023-02-15 11:04:08,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:04:08,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:08,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:08,781 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:08,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 11:04:08,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 11:04:08,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:08,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-15 11:04:08,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:08,868 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:08,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:08,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930647507] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:08,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:08,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 16 [2023-02-15 11:04:08,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135413821] [2023-02-15 11:04:08,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:08,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 11:04:08,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:08,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 11:04:08,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-02-15 11:04:08,959 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:09,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:09,047 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-02-15 11:04:09,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-15 11:04:09,047 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-15 11:04:09,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:09,048 INFO L225 Difference]: With dead ends: 51 [2023-02-15 11:04:09,048 INFO L226 Difference]: Without dead ends: 29 [2023-02-15 11:04:09,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2023-02-15 11:04:09,049 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:09,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 48 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:09,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-15 11:04:09,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-15 11:04:09,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:09,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-02-15 11:04:09,054 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2023-02-15 11:04:09,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:09,054 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-02-15 11:04:09,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:09,054 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-02-15 11:04:09,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 11:04:09,055 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:09,055 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:09,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:09,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-15 11:04:09,261 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:09,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:09,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2001354872, now seen corresponding path program 10 times [2023-02-15 11:04:09,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:09,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393191020] [2023-02-15 11:04:09,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:09,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:09,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 15 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:09,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:09,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393191020] [2023-02-15 11:04:09,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393191020] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:09,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929043011] [2023-02-15 11:04:09,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:04:09,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:09,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:09,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:09,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 11:04:09,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:04:09,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:09,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 11:04:09,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:09,488 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:09,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:09,575 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 21 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:09,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929043011] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:09,575 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:09,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2023-02-15 11:04:09,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942923739] [2023-02-15 11:04:09,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:09,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-15 11:04:09,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:09,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-15 11:04:09,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-15 11:04:09,577 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:09,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:09,671 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2023-02-15 11:04:09,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 11:04:09,672 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-15 11:04:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:09,674 INFO L225 Difference]: With dead ends: 40 [2023-02-15 11:04:09,674 INFO L226 Difference]: Without dead ends: 38 [2023-02-15 11:04:09,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 47 SyntacticMatches, 12 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:04:09,675 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:09,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 35 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-15 11:04:09,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-02-15 11:04:09,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-02-15 11:04:09,686 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 28 [2023-02-15 11:04:09,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:09,686 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-02-15 11:04:09,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:09,686 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-02-15 11:04:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 11:04:09,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:09,690 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:09,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-15 11:04:09,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 11:04:09,895 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:09,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:09,896 INFO L85 PathProgramCache]: Analyzing trace with hash 377831601, now seen corresponding path program 11 times [2023-02-15 11:04:09,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:09,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980696707] [2023-02-15 11:04:09,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:09,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:10,045 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:10,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:10,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980696707] [2023-02-15 11:04:10,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980696707] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:10,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981182498] [2023-02-15 11:04:10,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:04:10,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:10,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:10,048 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:10,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 11:04:10,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-15 11:04:10,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:10,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 11:04:10,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:10,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:10,244 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:10,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981182498] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:10,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:10,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 18 [2023-02-15 11:04:10,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117134346] [2023-02-15 11:04:10,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:10,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 11:04:10,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:10,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 11:04:10,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2023-02-15 11:04:10,246 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:10,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:10,349 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2023-02-15 11:04:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-15 11:04:10,349 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 11:04:10,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:10,351 INFO L225 Difference]: With dead ends: 58 [2023-02-15 11:04:10,351 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 11:04:10,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2023-02-15 11:04:10,353 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:10,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:10,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 11:04:10,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-15 11:04:10,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-02-15 11:04:10,381 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2023-02-15 11:04:10,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:10,381 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-02-15 11:04:10,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:10,382 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-02-15 11:04:10,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-15 11:04:10,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:10,385 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:10,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:10,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 11:04:10,590 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:10,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1007703532, now seen corresponding path program 12 times [2023-02-15 11:04:10,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:10,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895470035] [2023-02-15 11:04:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:10,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 21 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:10,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:10,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895470035] [2023-02-15 11:04:10,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895470035] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:10,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230471525] [2023-02-15 11:04:10,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:04:10,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:10,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:10,745 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:10,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 11:04:10,790 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 11:04:10,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:10,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 11:04:10,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:10,846 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:10,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:10,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230471525] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:10,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:10,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2023-02-15 11:04:10,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808085867] [2023-02-15 11:04:10,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:10,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 11:04:10,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 11:04:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2023-02-15 11:04:10,947 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:11,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:11,063 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2023-02-15 11:04:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 11:04:11,064 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-15 11:04:11,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:11,065 INFO L225 Difference]: With dead ends: 44 [2023-02-15 11:04:11,065 INFO L226 Difference]: Without dead ends: 42 [2023-02-15 11:04:11,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 54 SyntacticMatches, 14 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:04:11,066 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:11,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 32 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:11,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-15 11:04:11,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2023-02-15 11:04:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:11,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-02-15 11:04:11,071 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2023-02-15 11:04:11,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:11,071 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-02-15 11:04:11,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:11,071 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-02-15 11:04:11,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-15 11:04:11,072 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:11,072 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:11,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:11,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-15 11:04:11,277 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:11,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:11,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1320656947, now seen corresponding path program 13 times [2023-02-15 11:04:11,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:11,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559115918] [2023-02-15 11:04:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:11,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:11,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:11,504 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:11,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:11,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559115918] [2023-02-15 11:04:11,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559115918] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:11,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201444307] [2023-02-15 11:04:11,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:04:11,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:11,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:11,509 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:11,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-15 11:04:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:11,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 11:04:11,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:11,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:11,744 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:11,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201444307] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:11,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:11,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 20 [2023-02-15 11:04:11,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264159719] [2023-02-15 11:04:11,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:11,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 11:04:11,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:11,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 11:04:11,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:04:11,746 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:11,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:11,878 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2023-02-15 11:04:11,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 11:04:11,878 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-15 11:04:11,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:11,879 INFO L225 Difference]: With dead ends: 65 [2023-02-15 11:04:11,879 INFO L226 Difference]: Without dead ends: 37 [2023-02-15 11:04:11,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2023-02-15 11:04:11,880 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:11,880 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 65 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:11,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-15 11:04:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-15 11:04:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-02-15 11:04:11,884 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2023-02-15 11:04:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:11,884 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-02-15 11:04:11,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:11,885 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-02-15 11:04:11,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-15 11:04:11,885 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:11,885 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:11,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:12,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:12,089 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:12,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:12,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1149263752, now seen corresponding path program 14 times [2023-02-15 11:04:12,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:12,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732529764] [2023-02-15 11:04:12,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:12,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 28 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:12,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:12,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732529764] [2023-02-15 11:04:12,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732529764] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:12,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658909621] [2023-02-15 11:04:12,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:04:12,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:12,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:12,268 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:12,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-15 11:04:12,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:04:12,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:12,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 11:04:12,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:12,374 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:12,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 36 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:12,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658909621] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:12,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:12,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2023-02-15 11:04:12,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380329594] [2023-02-15 11:04:12,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:12,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-15 11:04:12,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:12,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-15 11:04:12,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-02-15 11:04:12,481 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:12,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:12,590 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2023-02-15 11:04:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 11:04:12,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-15 11:04:12,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:12,591 INFO L225 Difference]: With dead ends: 48 [2023-02-15 11:04:12,591 INFO L226 Difference]: Without dead ends: 46 [2023-02-15 11:04:12,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 16 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:04:12,592 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:12,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 22 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:04:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-02-15 11:04:12,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2023-02-15 11:04:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:12,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2023-02-15 11:04:12,596 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 36 [2023-02-15 11:04:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:12,597 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2023-02-15 11:04:12,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:12,597 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2023-02-15 11:04:12,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 11:04:12,597 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:12,597 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:12,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:12,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-15 11:04:12,801 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:12,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:12,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1758027599, now seen corresponding path program 15 times [2023-02-15 11:04:12,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:12,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525369866] [2023-02-15 11:04:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:12,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:12,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:13,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:13,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525369866] [2023-02-15 11:04:13,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525369866] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:13,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859673425] [2023-02-15 11:04:13,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:04:13,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:13,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:13,032 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:13,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-15 11:04:13,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-15 11:04:13,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 11:04:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:13,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:13,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859673425] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:13,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:13,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 22 [2023-02-15 11:04:13,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133138205] [2023-02-15 11:04:13,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:13,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 11:04:13,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:13,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 11:04:13,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:04:13,321 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:13,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:13,480 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2023-02-15 11:04:13,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-15 11:04:13,481 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-02-15 11:04:13,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:13,481 INFO L225 Difference]: With dead ends: 72 [2023-02-15 11:04:13,481 INFO L226 Difference]: Without dead ends: 41 [2023-02-15 11:04:13,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 19 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=740, Unknown=0, NotChecked=0, Total=992 [2023-02-15 11:04:13,482 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:13,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 79 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:13,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-02-15 11:04:13,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-02-15 11:04:13,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:13,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-02-15 11:04:13,486 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2023-02-15 11:04:13,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:13,486 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-02-15 11:04:13,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 22 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:13,487 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-02-15 11:04:13,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-15 11:04:13,487 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:13,487 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:13,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:13,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-15 11:04:13,692 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:13,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:13,693 INFO L85 PathProgramCache]: Analyzing trace with hash -895333652, now seen corresponding path program 16 times [2023-02-15 11:04:13,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:13,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697591289] [2023-02-15 11:04:13,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:13,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:13,857 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 36 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:13,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:13,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697591289] [2023-02-15 11:04:13,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697591289] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:13,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612437333] [2023-02-15 11:04:13,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:04:13,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:13,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:13,859 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:13,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-15 11:04:13,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:04:13,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:13,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 11:04:13,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:13,971 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:13,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:14,107 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 45 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:14,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612437333] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:14,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:14,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2023-02-15 11:04:14,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438552824] [2023-02-15 11:04:14,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:14,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 11:04:14,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:14,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 11:04:14,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-02-15 11:04:14,108 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:14,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:14,238 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2023-02-15 11:04:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 11:04:14,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-15 11:04:14,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:14,239 INFO L225 Difference]: With dead ends: 52 [2023-02-15 11:04:14,239 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 11:04:14,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 68 SyntacticMatches, 18 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=422, Unknown=0, NotChecked=0, Total=650 [2023-02-15 11:04:14,240 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 26 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:14,240 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 37 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:14,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 11:04:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2023-02-15 11:04:14,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-02-15 11:04:14,244 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 40 [2023-02-15 11:04:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:14,248 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-02-15 11:04:14,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-02-15 11:04:14,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-15 11:04:14,249 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:14,249 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:14,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:14,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-15 11:04:14,455 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:14,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:14,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1133098291, now seen corresponding path program 17 times [2023-02-15 11:04:14,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:14,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434167532] [2023-02-15 11:04:14,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:14,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:14,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:14,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:14,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434167532] [2023-02-15 11:04:14,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434167532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:14,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308992253] [2023-02-15 11:04:14,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:04:14,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:14,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:14,711 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:14,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-15 11:04:14,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-15 11:04:14,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:14,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-15 11:04:14,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:14,820 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:14,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:15,018 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:15,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308992253] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:15,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:15,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 24 [2023-02-15 11:04:15,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548318070] [2023-02-15 11:04:15,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:15,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 11:04:15,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:15,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 11:04:15,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=407, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:04:15,020 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:15,192 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2023-02-15 11:04:15,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 11:04:15,193 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-02-15 11:04:15,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:15,193 INFO L225 Difference]: With dead ends: 79 [2023-02-15 11:04:15,193 INFO L226 Difference]: Without dead ends: 45 [2023-02-15 11:04:15,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 64 SyntacticMatches, 21 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 11:04:15,195 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:15,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 75 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:15,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-15 11:04:15,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-02-15 11:04:15,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:15,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-02-15 11:04:15,203 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2023-02-15 11:04:15,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:15,204 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-02-15 11:04:15,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:15,204 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-02-15 11:04:15,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-15 11:04:15,208 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:15,209 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:15,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:15,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:15,417 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:15,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:15,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1589878904, now seen corresponding path program 18 times [2023-02-15 11:04:15,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:15,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263563198] [2023-02-15 11:04:15,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:15,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:15,615 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:15,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:15,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263563198] [2023-02-15 11:04:15,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263563198] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:15,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006119158] [2023-02-15 11:04:15,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:04:15,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:15,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:15,617 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:15,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-15 11:04:15,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-15 11:04:15,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:15,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 11:04:15,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:15,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:15,871 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 55 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:15,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006119158] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:15,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:15,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2023-02-15 11:04:15,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201553018] [2023-02-15 11:04:15,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:15,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 11:04:15,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:15,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 11:04:15,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2023-02-15 11:04:15,875 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:16,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:16,013 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2023-02-15 11:04:16,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 11:04:16,014 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-15 11:04:16,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:16,014 INFO L225 Difference]: With dead ends: 56 [2023-02-15 11:04:16,014 INFO L226 Difference]: Without dead ends: 54 [2023-02-15 11:04:16,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 20 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2023-02-15 11:04:16,016 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 30 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:16,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 30 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-15 11:04:16,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-02-15 11:04:16,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:16,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2023-02-15 11:04:16,024 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2023-02-15 11:04:16,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:16,024 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2023-02-15 11:04:16,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:16,024 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2023-02-15 11:04:16,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-15 11:04:16,025 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:16,025 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:16,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:16,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:16,231 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:16,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:16,231 INFO L85 PathProgramCache]: Analyzing trace with hash 821731505, now seen corresponding path program 19 times [2023-02-15 11:04:16,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:16,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698712513] [2023-02-15 11:04:16,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:16,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:16,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:16,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698712513] [2023-02-15 11:04:16,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698712513] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:16,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174260395] [2023-02-15 11:04:16,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:04:16,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:16,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:16,525 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:16,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-15 11:04:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:16,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-15 11:04:16,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:16,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:16,876 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:16,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174260395] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:16,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:16,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 26 [2023-02-15 11:04:16,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243531384] [2023-02-15 11:04:16,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:16,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 11:04:16,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:16,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 11:04:16,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2023-02-15 11:04:16,878 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:17,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:17,063 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2023-02-15 11:04:17,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-15 11:04:17,064 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-15 11:04:17,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:17,064 INFO L225 Difference]: With dead ends: 86 [2023-02-15 11:04:17,064 INFO L226 Difference]: Without dead ends: 49 [2023-02-15 11:04:17,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 70 SyntacticMatches, 23 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=350, Invalid=1056, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 11:04:17,065 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:17,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 92 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-15 11:04:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-02-15 11:04:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-02-15 11:04:17,070 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2023-02-15 11:04:17,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:17,070 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-02-15 11:04:17,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-02-15 11:04:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-15 11:04:17,071 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:17,071 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:17,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:17,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-02-15 11:04:17,276 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:17,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:17,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1726078956, now seen corresponding path program 20 times [2023-02-15 11:04:17,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:17,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247440653] [2023-02-15 11:04:17,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:17,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:17,494 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 55 proven. 166 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:17,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:17,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247440653] [2023-02-15 11:04:17,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247440653] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:17,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241768676] [2023-02-15 11:04:17,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:04:17,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:17,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:17,496 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:17,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-15 11:04:17,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:04:17,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 11:04:17,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:17,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 66 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:17,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241768676] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:17,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:17,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2023-02-15 11:04:17,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360854162] [2023-02-15 11:04:17,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:17,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 11:04:17,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:17,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 11:04:17,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2023-02-15 11:04:17,792 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:17,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:17,947 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2023-02-15 11:04:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 11:04:17,947 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-15 11:04:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:17,948 INFO L225 Difference]: With dead ends: 60 [2023-02-15 11:04:17,948 INFO L226 Difference]: Without dead ends: 58 [2023-02-15 11:04:17,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 82 SyntacticMatches, 22 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=307, Invalid=563, Unknown=0, NotChecked=0, Total=870 [2023-02-15 11:04:17,948 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:17,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 23 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:17,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-15 11:04:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2023-02-15 11:04:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:17,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2023-02-15 11:04:17,955 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 48 [2023-02-15 11:04:17,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:17,956 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2023-02-15 11:04:17,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:17,957 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2023-02-15 11:04:17,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-15 11:04:17,957 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:17,957 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:17,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:18,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-15 11:04:18,160 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:18,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:18,160 INFO L85 PathProgramCache]: Analyzing trace with hash -2020436531, now seen corresponding path program 21 times [2023-02-15 11:04:18,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:18,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811712120] [2023-02-15 11:04:18,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:18,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:18,486 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:18,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811712120] [2023-02-15 11:04:18,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811712120] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:18,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708826614] [2023-02-15 11:04:18,486 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:04:18,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:18,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:18,489 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:18,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-15 11:04:18,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-15 11:04:18,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:18,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-15 11:04:18,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:18,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:18,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708826614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:18,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:18,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 28 [2023-02-15 11:04:18,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168106795] [2023-02-15 11:04:18,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:18,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 11:04:18,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:18,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 11:04:18,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-02-15 11:04:18,830 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:19,040 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2023-02-15 11:04:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 11:04:19,040 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2023-02-15 11:04:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:19,040 INFO L225 Difference]: With dead ends: 93 [2023-02-15 11:04:19,040 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 11:04:19,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 76 SyntacticMatches, 25 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 11:04:19,041 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:19,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 97 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:19,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 11:04:19,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-15 11:04:19,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:19,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-02-15 11:04:19,046 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2023-02-15 11:04:19,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:19,047 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-02-15 11:04:19,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:19,047 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-02-15 11:04:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 11:04:19,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:19,047 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:19,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:19,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:19,253 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:19,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:19,253 INFO L85 PathProgramCache]: Analyzing trace with hash -318652536, now seen corresponding path program 22 times [2023-02-15 11:04:19,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:19,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201034405] [2023-02-15 11:04:19,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:19,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 66 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:19,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201034405] [2023-02-15 11:04:19,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201034405] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:19,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385448084] [2023-02-15 11:04:19,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:04:19,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:19,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:19,496 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:19,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-15 11:04:19,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:04:19,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:19,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 11:04:19,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:19,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:19,792 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 78 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:19,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385448084] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:19,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:19,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2023-02-15 11:04:19,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970790498] [2023-02-15 11:04:19,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:19,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-15 11:04:19,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:19,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-15 11:04:19,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2023-02-15 11:04:19,794 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:19,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:19,945 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2023-02-15 11:04:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 11:04:19,945 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-15 11:04:19,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:19,946 INFO L225 Difference]: With dead ends: 64 [2023-02-15 11:04:19,946 INFO L226 Difference]: Without dead ends: 62 [2023-02-15 11:04:19,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 89 SyntacticMatches, 24 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=641, Unknown=0, NotChecked=0, Total=992 [2023-02-15 11:04:19,947 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:19,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 34 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:19,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-02-15 11:04:19,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2023-02-15 11:04:19,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:19,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-02-15 11:04:19,951 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 52 [2023-02-15 11:04:19,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:19,951 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-02-15 11:04:19,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:19,952 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-02-15 11:04:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 11:04:19,952 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:19,952 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:19,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:20,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:20,153 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:20,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1095155535, now seen corresponding path program 23 times [2023-02-15 11:04:20,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:20,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050443834] [2023-02-15 11:04:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:20,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:20,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:20,509 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:20,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:20,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050443834] [2023-02-15 11:04:20,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050443834] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:20,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544783530] [2023-02-15 11:04:20,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:04:20,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:20,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:20,511 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:20,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-15 11:04:20,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-15 11:04:20,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:20,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 11:04:20,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:20,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:20,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544783530] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:20,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:20,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 30 [2023-02-15 11:04:20,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980882180] [2023-02-15 11:04:20,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:20,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 11:04:20,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:20,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 11:04:20,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2023-02-15 11:04:20,926 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:21,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:21,170 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2023-02-15 11:04:21,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-15 11:04:21,171 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 11:04:21,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:21,171 INFO L225 Difference]: With dead ends: 100 [2023-02-15 11:04:21,171 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 11:04:21,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 82 SyntacticMatches, 27 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1428, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 11:04:21,173 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:21,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 123 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 11:04:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-15 11:04:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:21,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-02-15 11:04:21,179 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2023-02-15 11:04:21,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:21,179 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-02-15 11:04:21,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-02-15 11:04:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-15 11:04:21,180 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:21,180 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:21,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-15 11:04:21,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-02-15 11:04:21,385 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:21,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:21,386 INFO L85 PathProgramCache]: Analyzing trace with hash 548869356, now seen corresponding path program 24 times [2023-02-15 11:04:21,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:21,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856505922] [2023-02-15 11:04:21,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:21,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:21,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:21,643 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 78 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:21,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:21,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856505922] [2023-02-15 11:04:21,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856505922] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:21,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533996097] [2023-02-15 11:04:21,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:04:21,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:21,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:21,645 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:21,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-15 11:04:21,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-15 11:04:21,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:21,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 11:04:21,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:21,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 91 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:21,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533996097] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:21,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:21,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2023-02-15 11:04:21,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761595034] [2023-02-15 11:04:21,996 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:21,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-15 11:04:21,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:21,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-15 11:04:21,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=214, Unknown=0, NotChecked=0, Total=342 [2023-02-15 11:04:21,997 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:22,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:22,175 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2023-02-15 11:04:22,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 11:04:22,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-15 11:04:22,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:22,176 INFO L225 Difference]: With dead ends: 68 [2023-02-15 11:04:22,176 INFO L226 Difference]: Without dead ends: 66 [2023-02-15 11:04:22,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 96 SyntacticMatches, 26 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=398, Invalid=724, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 11:04:22,177 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 62 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:22,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 31 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-15 11:04:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2023-02-15 11:04:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2023-02-15 11:04:22,192 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2023-02-15 11:04:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:22,192 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2023-02-15 11:04:22,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2023-02-15 11:04:22,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-15 11:04:22,193 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:22,193 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:22,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:22,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-15 11:04:22,398 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:22,399 INFO L85 PathProgramCache]: Analyzing trace with hash 431309005, now seen corresponding path program 25 times [2023-02-15 11:04:22,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:22,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009649021] [2023-02-15 11:04:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:22,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:22,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:22,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009649021] [2023-02-15 11:04:22,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009649021] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:22,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339315233] [2023-02-15 11:04:22,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:04:22,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:22,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:22,809 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:22,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-15 11:04:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:22,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-15 11:04:22,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:22,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:23,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339315233] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:23,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:23,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 32 [2023-02-15 11:04:23,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212482266] [2023-02-15 11:04:23,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:23,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 11:04:23,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:23,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 11:04:23,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2023-02-15 11:04:23,265 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:23,549 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2023-02-15 11:04:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-15 11:04:23,549 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-02-15 11:04:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:23,550 INFO L225 Difference]: With dead ends: 107 [2023-02-15 11:04:23,550 INFO L226 Difference]: Without dead ends: 61 [2023-02-15 11:04:23,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 88 SyntacticMatches, 29 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=527, Invalid=1635, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 11:04:23,551 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:23,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 147 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:23,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-02-15 11:04:23,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-02-15 11:04:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:23,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-02-15 11:04:23,560 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2023-02-15 11:04:23,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:23,560 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-02-15 11:04:23,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 32 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:23,560 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-02-15 11:04:23,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-15 11:04:23,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:23,561 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:23,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:23,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-15 11:04:23,766 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:23,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:23,767 INFO L85 PathProgramCache]: Analyzing trace with hash -471302264, now seen corresponding path program 26 times [2023-02-15 11:04:23,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:23,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703605025] [2023-02-15 11:04:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:23,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 91 proven. 274 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:24,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:24,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703605025] [2023-02-15 11:04:24,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703605025] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:24,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571560713] [2023-02-15 11:04:24,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:04:24,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:24,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:24,065 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:24,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-15 11:04:24,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:04:24,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:24,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 11:04:24,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:24,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:24,429 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 105 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:24,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571560713] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:24,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:24,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2023-02-15 11:04:24,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657025597] [2023-02-15 11:04:24,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:24,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-15 11:04:24,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:24,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-15 11:04:24,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2023-02-15 11:04:24,430 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:24,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:24,606 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2023-02-15 11:04:24,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 11:04:24,607 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-02-15 11:04:24,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:24,607 INFO L225 Difference]: With dead ends: 72 [2023-02-15 11:04:24,607 INFO L226 Difference]: Without dead ends: 70 [2023-02-15 11:04:24,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 103 SyntacticMatches, 28 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 11:04:24,608 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:24,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 31 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-02-15 11:04:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2023-02-15 11:04:24,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:24,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2023-02-15 11:04:24,615 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 60 [2023-02-15 11:04:24,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:24,616 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2023-02-15 11:04:24,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:24,616 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2023-02-15 11:04:24,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-02-15 11:04:24,616 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:24,617 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:24,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:24,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-15 11:04:24,822 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:24,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:24,823 INFO L85 PathProgramCache]: Analyzing trace with hash -312835919, now seen corresponding path program 27 times [2023-02-15 11:04:24,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:24,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833615312] [2023-02-15 11:04:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:24,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:25,272 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:25,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:25,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833615312] [2023-02-15 11:04:25,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833615312] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:25,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118661543] [2023-02-15 11:04:25,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:04:25,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:25,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:25,274 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:25,276 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-15 11:04:25,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-15 11:04:25,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:25,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 11:04:25,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:25,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:25,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118661543] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:25,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:25,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 34 [2023-02-15 11:04:25,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573964601] [2023-02-15 11:04:25,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:25,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 11:04:25,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:25,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 11:04:25,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 11:04:25,734 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:26,008 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2023-02-15 11:04:26,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 11:04:26,008 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2023-02-15 11:04:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:26,008 INFO L225 Difference]: With dead ends: 114 [2023-02-15 11:04:26,008 INFO L226 Difference]: Without dead ends: 65 [2023-02-15 11:04:26,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 94 SyntacticMatches, 31 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=594, Invalid=1856, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 11:04:26,010 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:26,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 149 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:26,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-15 11:04:26,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-02-15 11:04:26,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:26,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-02-15 11:04:26,015 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 63 [2023-02-15 11:04:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:26,016 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-02-15 11:04:26,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.911764705882353) internal successors, (65), 34 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:26,016 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-02-15 11:04:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-15 11:04:26,016 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:26,017 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:26,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-02-15 11:04:26,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-15 11:04:26,221 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:26,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:26,222 INFO L85 PathProgramCache]: Analyzing trace with hash -636884500, now seen corresponding path program 28 times [2023-02-15 11:04:26,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:26,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443233174] [2023-02-15 11:04:26,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:26,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:26,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 105 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:26,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:26,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443233174] [2023-02-15 11:04:26,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443233174] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:26,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943720778] [2023-02-15 11:04:26,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:04:26,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:26,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:26,536 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:26,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-15 11:04:26,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:04:26,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:26,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 11:04:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:26,694 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:26,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 120 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:26,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943720778] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:26,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:26,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2023-02-15 11:04:26,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045413735] [2023-02-15 11:04:26,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:26,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 11:04:26,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:26,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 11:04:26,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2023-02-15 11:04:26,921 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:27,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:27,101 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2023-02-15 11:04:27,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 11:04:27,101 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-02-15 11:04:27,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:27,102 INFO L225 Difference]: With dead ends: 76 [2023-02-15 11:04:27,102 INFO L226 Difference]: Without dead ends: 74 [2023-02-15 11:04:27,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 110 SyntacticMatches, 30 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=501, Invalid=905, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 11:04:27,103 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:27,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 33 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:27,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-15 11:04:27,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2023-02-15 11:04:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:27,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2023-02-15 11:04:27,110 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 64 [2023-02-15 11:04:27,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:27,111 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2023-02-15 11:04:27,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:27,111 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2023-02-15 11:04:27,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-02-15 11:04:27,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:27,112 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:27,116 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:27,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:27,312 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:27,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:27,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1744194509, now seen corresponding path program 29 times [2023-02-15 11:04:27,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:27,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829887415] [2023-02-15 11:04:27,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:27,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:27,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:27,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829887415] [2023-02-15 11:04:27,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829887415] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:27,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544816906] [2023-02-15 11:04:27,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:04:27,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:27,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:27,849 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:27,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-15 11:04:27,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-02-15 11:04:27,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:27,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-15 11:04:27,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:28,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:28,415 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:28,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544816906] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:28,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:28,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 36 [2023-02-15 11:04:28,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690171794] [2023-02-15 11:04:28,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:28,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 11:04:28,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:28,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 11:04:28,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=935, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 11:04:28,416 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:28,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:28,688 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2023-02-15 11:04:28,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 11:04:28,689 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2023-02-15 11:04:28,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:28,689 INFO L225 Difference]: With dead ends: 121 [2023-02-15 11:04:28,690 INFO L226 Difference]: Without dead ends: 69 [2023-02-15 11:04:28,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 100 SyntacticMatches, 33 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-02-15 11:04:28,691 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:28,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 99 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:28,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-02-15 11:04:28,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2023-02-15 11:04:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2023-02-15 11:04:28,698 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 67 [2023-02-15 11:04:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:28,699 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2023-02-15 11:04:28,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 36 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2023-02-15 11:04:28,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-15 11:04:28,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:28,700 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:28,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:28,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-02-15 11:04:28,905 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:28,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:28,906 INFO L85 PathProgramCache]: Analyzing trace with hash 805871496, now seen corresponding path program 30 times [2023-02-15 11:04:28,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:28,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559113246] [2023-02-15 11:04:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:28,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:29,262 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 120 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:29,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559113246] [2023-02-15 11:04:29,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559113246] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486834288] [2023-02-15 11:04:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:04:29,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:29,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:29,265 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:29,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-15 11:04:29,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-02-15 11:04:29,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:29,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 11:04:29,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:29,418 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:29,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 136 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:29,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486834288] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:29,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:29,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2023-02-15 11:04:29,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140338570] [2023-02-15 11:04:29,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:29,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-15 11:04:29,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-15 11:04:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=283, Unknown=0, NotChecked=0, Total=462 [2023-02-15 11:04:29,663 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:29,869 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2023-02-15 11:04:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 11:04:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-02-15 11:04:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:29,870 INFO L225 Difference]: With dead ends: 80 [2023-02-15 11:04:29,871 INFO L226 Difference]: Without dead ends: 78 [2023-02-15 11:04:29,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 117 SyntacticMatches, 32 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=557, Invalid=1003, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 11:04:29,872 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 40 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:29,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-15 11:04:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2023-02-15 11:04:29,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:29,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2023-02-15 11:04:29,890 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2023-02-15 11:04:29,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:29,890 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2023-02-15 11:04:29,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.272727272727273) internal successors, (72), 22 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:29,891 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2023-02-15 11:04:29,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 11:04:29,891 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:29,891 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:29,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:30,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:30,092 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:30,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1144627023, now seen corresponding path program 31 times [2023-02-15 11:04:30,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:30,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340469609] [2023-02-15 11:04:30,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:30,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:30,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:30,647 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:30,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:30,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340469609] [2023-02-15 11:04:30,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340469609] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:30,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56423967] [2023-02-15 11:04:30,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:04:30,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:30,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:30,649 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:30,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-15 11:04:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:30,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 11:04:30,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:30,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:31,181 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:31,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56423967] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:31,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:31,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 38 [2023-02-15 11:04:31,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23730154] [2023-02-15 11:04:31,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:31,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 11:04:31,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 11:04:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1044, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 11:04:31,184 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:31,498 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2023-02-15 11:04:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-15 11:04:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-15 11:04:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:31,499 INFO L225 Difference]: With dead ends: 128 [2023-02-15 11:04:31,499 INFO L226 Difference]: Without dead ends: 73 [2023-02-15 11:04:31,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 106 SyntacticMatches, 35 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=740, Invalid=2340, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 11:04:31,500 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:31,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 121 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:31,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-02-15 11:04:31,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2023-02-15 11:04:31,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-02-15 11:04:31,508 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 71 [2023-02-15 11:04:31,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:31,508 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-02-15 11:04:31,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 38 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-02-15 11:04:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-15 11:04:31,508 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:31,509 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:31,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:31,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:31,709 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:31,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:31,709 INFO L85 PathProgramCache]: Analyzing trace with hash -960340244, now seen corresponding path program 32 times [2023-02-15 11:04:31,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:31,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434155093] [2023-02-15 11:04:31,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:31,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:31,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:32,049 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 136 proven. 409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:32,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:32,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434155093] [2023-02-15 11:04:32,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434155093] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:32,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463456877] [2023-02-15 11:04:32,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:04:32,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:32,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:32,053 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:32,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-15 11:04:32,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:04:32,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:32,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 11:04:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:32,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:32,539 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 153 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:32,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463456877] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:32,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:32,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 23 [2023-02-15 11:04:32,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295936729] [2023-02-15 11:04:32,539 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:32,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 11:04:32,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:32,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 11:04:32,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2023-02-15 11:04:32,541 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:32,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:32,746 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2023-02-15 11:04:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 11:04:32,747 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-02-15 11:04:32,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:32,747 INFO L225 Difference]: With dead ends: 84 [2023-02-15 11:04:32,747 INFO L226 Difference]: Without dead ends: 82 [2023-02-15 11:04:32,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 124 SyntacticMatches, 34 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=616, Invalid=1106, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 11:04:32,748 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:32,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 31 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-02-15 11:04:32,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 76. [2023-02-15 11:04:32,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:32,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2023-02-15 11:04:32,754 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 72 [2023-02-15 11:04:32,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:32,754 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2023-02-15 11:04:32,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 23 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:32,754 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2023-02-15 11:04:32,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-02-15 11:04:32,754 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:32,755 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:32,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:32,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-02-15 11:04:32,955 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:32,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:32,956 INFO L85 PathProgramCache]: Analyzing trace with hash -714230067, now seen corresponding path program 33 times [2023-02-15 11:04:32,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:32,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227458777] [2023-02-15 11:04:32,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:32,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:32,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:33,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:33,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227458777] [2023-02-15 11:04:33,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227458777] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:33,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557246980] [2023-02-15 11:04:33,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:04:33,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:33,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:33,489 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:33,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-15 11:04:33,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-02-15 11:04:33,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:33,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-15 11:04:33,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:33,631 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:33,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:34,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557246980] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:34,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:34,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 40 [2023-02-15 11:04:34,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004194822] [2023-02-15 11:04:34,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:34,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 11:04:34,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:34,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 11:04:34,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=1159, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 11:04:34,048 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:34,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:34,465 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-02-15 11:04:34,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-15 11:04:34,465 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2023-02-15 11:04:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:34,466 INFO L225 Difference]: With dead ends: 135 [2023-02-15 11:04:34,466 INFO L226 Difference]: Without dead ends: 77 [2023-02-15 11:04:34,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 112 SyntacticMatches, 37 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=819, Invalid=2603, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 11:04:34,467 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:34,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 220 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:04:34,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-02-15 11:04:34,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2023-02-15 11:04:34,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-02-15 11:04:34,477 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 75 [2023-02-15 11:04:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:34,477 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-02-15 11:04:34,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.925) internal successors, (77), 40 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-02-15 11:04:34,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-15 11:04:34,478 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:34,478 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:34,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-02-15 11:04:34,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-15 11:04:34,681 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:34,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:34,681 INFO L85 PathProgramCache]: Analyzing trace with hash -377872504, now seen corresponding path program 34 times [2023-02-15 11:04:34,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:34,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996711153] [2023-02-15 11:04:34,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:34,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 153 proven. 460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:35,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:35,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996711153] [2023-02-15 11:04:35,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996711153] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:35,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146697153] [2023-02-15 11:04:35,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:04:35,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:35,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:35,089 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:35,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-15 11:04:35,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:04:35,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 11:04:35,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:35,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 171 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:35,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146697153] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:35,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:35,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 24 [2023-02-15 11:04:35,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245635200] [2023-02-15 11:04:35,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:35,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 11:04:35,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:35,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 11:04:35,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2023-02-15 11:04:35,582 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:35,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:35,810 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2023-02-15 11:04:35,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 11:04:35,810 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-02-15 11:04:35,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:35,811 INFO L225 Difference]: With dead ends: 88 [2023-02-15 11:04:35,811 INFO L226 Difference]: Without dead ends: 86 [2023-02-15 11:04:35,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 131 SyntacticMatches, 36 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=678, Invalid=1214, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 11:04:35,812 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:35,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 27 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:35,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-15 11:04:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2023-02-15 11:04:35,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:35,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2023-02-15 11:04:35,822 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 76 [2023-02-15 11:04:35,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:35,822 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2023-02-15 11:04:35,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.3333333333333335) internal successors, (80), 24 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:35,823 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2023-02-15 11:04:35,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-02-15 11:04:35,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:35,823 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:35,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-02-15 11:04:36,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-15 11:04:36,028 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:36,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:36,028 INFO L85 PathProgramCache]: Analyzing trace with hash -85663567, now seen corresponding path program 35 times [2023-02-15 11:04:36,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:36,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656689971] [2023-02-15 11:04:36,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:36,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:36,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:36,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656689971] [2023-02-15 11:04:36,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656689971] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:36,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833403913] [2023-02-15 11:04:36,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:04:36,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:36,696 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:36,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-15 11:04:36,766 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-02-15 11:04:36,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:36,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-15 11:04:36,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:36,845 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:36,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:37,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833403913] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:37,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:37,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 42 [2023-02-15 11:04:37,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128341802] [2023-02-15 11:04:37,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:37,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 11:04:37,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:37,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 11:04:37,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1280, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 11:04:37,309 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:37,662 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2023-02-15 11:04:37,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 11:04:37,663 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-02-15 11:04:37,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:37,668 INFO L225 Difference]: With dead ends: 142 [2023-02-15 11:04:37,668 INFO L226 Difference]: Without dead ends: 81 [2023-02-15 11:04:37,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 118 SyntacticMatches, 39 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1414 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=902, Invalid=2880, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 11:04:37,669 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:37,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 128 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:37,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-15 11:04:37,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2023-02-15 11:04:37,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:37,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-02-15 11:04:37,678 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 79 [2023-02-15 11:04:37,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:37,678 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-02-15 11:04:37,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:37,678 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-02-15 11:04:37,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-15 11:04:37,678 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:37,678 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:37,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-02-15 11:04:37,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:37,879 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:37,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash -322407444, now seen corresponding path program 36 times [2023-02-15 11:04:37,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:37,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775093287] [2023-02-15 11:04:37,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:37,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:38,302 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 171 proven. 514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:38,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:38,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775093287] [2023-02-15 11:04:38,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775093287] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:38,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411881850] [2023-02-15 11:04:38,303 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:04:38,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:38,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:38,304 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:38,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-15 11:04:38,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-02-15 11:04:38,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:38,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 11:04:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:38,467 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:38,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 190 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:38,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411881850] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:38,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:38,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 25 [2023-02-15 11:04:38,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958554080] [2023-02-15 11:04:38,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:38,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 11:04:38,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:38,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 11:04:38,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=361, Unknown=0, NotChecked=0, Total=600 [2023-02-15 11:04:38,794 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:39,033 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2023-02-15 11:04:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 11:04:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-02-15 11:04:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:39,034 INFO L225 Difference]: With dead ends: 92 [2023-02-15 11:04:39,034 INFO L226 Difference]: Without dead ends: 90 [2023-02-15 11:04:39,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 138 SyntacticMatches, 38 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=743, Invalid=1327, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 11:04:39,035 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 46 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:39,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 35 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:39,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-15 11:04:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 84. [2023-02-15 11:04:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:39,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2023-02-15 11:04:39,044 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2023-02-15 11:04:39,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:39,044 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2023-02-15 11:04:39,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 25 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:39,044 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2023-02-15 11:04:39,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-02-15 11:04:39,044 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:39,044 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:39,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:39,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-15 11:04:39,245 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:39,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:39,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1288470067, now seen corresponding path program 37 times [2023-02-15 11:04:39,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:39,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250228586] [2023-02-15 11:04:39,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:39,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:39,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:39,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250228586] [2023-02-15 11:04:39,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250228586] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:39,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820343433] [2023-02-15 11:04:39,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:04:39,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:39,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:39,905 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:39,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-15 11:04:39,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-15 11:04:39,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:40,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:40,535 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:40,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820343433] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:40,535 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:40,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 44 [2023-02-15 11:04:40,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712691643] [2023-02-15 11:04:40,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:40,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 11:04:40,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:40,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 11:04:40,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 11:04:40,537 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:40,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:40,948 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2023-02-15 11:04:40,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-15 11:04:40,948 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-02-15 11:04:40,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:40,948 INFO L225 Difference]: With dead ends: 149 [2023-02-15 11:04:40,949 INFO L226 Difference]: Without dead ends: 85 [2023-02-15 11:04:40,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 124 SyntacticMatches, 41 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1559 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=989, Invalid=3171, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 11:04:40,950 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:40,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 171 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-15 11:04:40,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-02-15 11:04:40,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:40,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-02-15 11:04:40,961 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 83 [2023-02-15 11:04:40,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:40,961 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-02-15 11:04:40,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 44 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-02-15 11:04:40,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-15 11:04:40,962 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:40,962 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:40,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:41,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-15 11:04:41,168 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:41,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:41,168 INFO L85 PathProgramCache]: Analyzing trace with hash 374669192, now seen corresponding path program 38 times [2023-02-15 11:04:41,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:41,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305636532] [2023-02-15 11:04:41,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:41,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 190 proven. 571 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:41,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:41,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305636532] [2023-02-15 11:04:41,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305636532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:41,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934369337] [2023-02-15 11:04:41,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:04:41,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:41,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:41,625 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:41,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-15 11:04:41,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:04:41,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:41,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 11:04:41,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:41,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 210 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:42,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934369337] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:42,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:42,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 26 [2023-02-15 11:04:42,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111654940] [2023-02-15 11:04:42,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:42,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-15 11:04:42,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:42,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-15 11:04:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=389, Unknown=0, NotChecked=0, Total=650 [2023-02-15 11:04:42,143 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:42,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:42,389 INFO L93 Difference]: Finished difference Result 96 states and 97 transitions. [2023-02-15 11:04:42,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 11:04:42,389 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-02-15 11:04:42,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:42,390 INFO L225 Difference]: With dead ends: 96 [2023-02-15 11:04:42,390 INFO L226 Difference]: Without dead ends: 94 [2023-02-15 11:04:42,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 145 SyntacticMatches, 40 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=811, Invalid=1445, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 11:04:42,390 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:42,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 37 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:42,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-15 11:04:42,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2023-02-15 11:04:42,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:42,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2023-02-15 11:04:42,410 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 84 [2023-02-15 11:04:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:42,410 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2023-02-15 11:04:42,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3846153846153846) internal successors, (88), 26 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2023-02-15 11:04:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-15 11:04:42,411 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:42,411 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:42,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:42,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-15 11:04:42,617 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:42,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:42,617 INFO L85 PathProgramCache]: Analyzing trace with hash -845283151, now seen corresponding path program 39 times [2023-02-15 11:04:42,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:42,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375644597] [2023-02-15 11:04:42,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:42,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:42,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:43,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:43,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375644597] [2023-02-15 11:04:43,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375644597] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:43,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070715960] [2023-02-15 11:04:43,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:04:43,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:43,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:43,387 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:43,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-15 11:04:43,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-02-15 11:04:43,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:43,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-15 11:04:43,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:43,549 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:43,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:44,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070715960] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:44,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:44,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 46 [2023-02-15 11:04:44,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596567359] [2023-02-15 11:04:44,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:44,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 11:04:44,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:44,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 11:04:44,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1540, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 11:04:44,095 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:44,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:44,517 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2023-02-15 11:04:44,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-15 11:04:44,517 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2023-02-15 11:04:44,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:44,517 INFO L225 Difference]: With dead ends: 156 [2023-02-15 11:04:44,517 INFO L226 Difference]: Without dead ends: 89 [2023-02-15 11:04:44,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 130 SyntacticMatches, 43 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1080, Invalid=3476, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 11:04:44,518 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:44,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 155 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:44,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-15 11:04:44,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-15 11:04:44,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:44,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-02-15 11:04:44,526 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 87 [2023-02-15 11:04:44,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:44,527 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-02-15 11:04:44,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.934782608695652) internal successors, (89), 46 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:44,527 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-02-15 11:04:44,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-02-15 11:04:44,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:44,527 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:44,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:44,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-15 11:04:44,728 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:44,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1543231252, now seen corresponding path program 40 times [2023-02-15 11:04:44,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:44,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925437790] [2023-02-15 11:04:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:44,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:44,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:45,166 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 210 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:45,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:45,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925437790] [2023-02-15 11:04:45,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925437790] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:45,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591613746] [2023-02-15 11:04:45,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:04:45,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:45,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:45,168 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:45,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-15 11:04:45,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:04:45,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:45,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 11:04:45,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:45,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 231 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:45,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591613746] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:45,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:45,721 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 27 [2023-02-15 11:04:45,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478138022] [2023-02-15 11:04:45,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:45,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-15 11:04:45,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:45,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-15 11:04:45,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2023-02-15 11:04:45,722 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:45,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:45,999 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2023-02-15 11:04:45,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-15 11:04:45,999 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-02-15 11:04:45,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:46,000 INFO L225 Difference]: With dead ends: 100 [2023-02-15 11:04:46,000 INFO L226 Difference]: Without dead ends: 98 [2023-02-15 11:04:46,000 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 152 SyntacticMatches, 42 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=882, Invalid=1568, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 11:04:46,000 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:46,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 36 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-15 11:04:46,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2023-02-15 11:04:46,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:46,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2023-02-15 11:04:46,012 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 88 [2023-02-15 11:04:46,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:46,013 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2023-02-15 11:04:46,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:46,013 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2023-02-15 11:04:46,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-02-15 11:04:46,013 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:46,013 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:46,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-02-15 11:04:46,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:46,219 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:46,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:46,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1067471667, now seen corresponding path program 41 times [2023-02-15 11:04:46,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:46,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900401261] [2023-02-15 11:04:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:46,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:46,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:46,921 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:46,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900401261] [2023-02-15 11:04:46,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900401261] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:46,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17730501] [2023-02-15 11:04:46,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:04:46,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:46,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:46,922 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:46,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-15 11:04:47,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-02-15 11:04:47,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:47,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-15 11:04:47,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:47,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:47,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17730501] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:47,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:47,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 48 [2023-02-15 11:04:47,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55367298] [2023-02-15 11:04:47,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:47,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 11:04:47,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:47,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 11:04:47,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 11:04:47,683 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:48,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:48,204 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2023-02-15 11:04:48,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-15 11:04:48,205 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2023-02-15 11:04:48,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:48,205 INFO L225 Difference]: With dead ends: 163 [2023-02-15 11:04:48,205 INFO L226 Difference]: Without dead ends: 93 [2023-02-15 11:04:48,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 136 SyntacticMatches, 45 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1175, Invalid=3795, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 11:04:48,206 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:48,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 221 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-15 11:04:48,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-02-15 11:04:48,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:48,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-02-15 11:04:48,218 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 91 [2023-02-15 11:04:48,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:48,218 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-02-15 11:04:48,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.9375) internal successors, (93), 48 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:48,219 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-02-15 11:04:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-15 11:04:48,219 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:48,219 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:48,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:48,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:48,425 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:48,425 INFO L85 PathProgramCache]: Analyzing trace with hash 716259208, now seen corresponding path program 42 times [2023-02-15 11:04:48,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:48,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786125983] [2023-02-15 11:04:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:48,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 231 proven. 694 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:48,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:48,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786125983] [2023-02-15 11:04:48,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786125983] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:48,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66649391] [2023-02-15 11:04:48,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:04:48,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:48,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:48,985 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:48,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-15 11:04:49,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-02-15 11:04:49,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:49,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 11:04:49,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:49,198 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:49,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 253 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:49,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66649391] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:49,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:49,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 28 [2023-02-15 11:04:49,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474577022] [2023-02-15 11:04:49,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:49,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 11:04:49,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 11:04:49,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=448, Unknown=0, NotChecked=0, Total=756 [2023-02-15 11:04:49,630 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:49,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:49,932 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2023-02-15 11:04:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 11:04:49,933 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-02-15 11:04:49,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:49,933 INFO L225 Difference]: With dead ends: 104 [2023-02-15 11:04:49,933 INFO L226 Difference]: Without dead ends: 102 [2023-02-15 11:04:49,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 159 SyntacticMatches, 44 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=956, Invalid=1696, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 11:04:49,934 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 96 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:49,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 27 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:49,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-15 11:04:49,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2023-02-15 11:04:49,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2023-02-15 11:04:49,953 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2023-02-15 11:04:49,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:49,953 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2023-02-15 11:04:49,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2023-02-15 11:04:49,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-02-15 11:04:49,954 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:49,954 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:49,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:50,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-02-15 11:04:50,161 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:50,161 INFO L85 PathProgramCache]: Analyzing trace with hash 685359281, now seen corresponding path program 43 times [2023-02-15 11:04:50,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:50,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526197997] [2023-02-15 11:04:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:50,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:50,927 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:50,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:50,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526197997] [2023-02-15 11:04:50,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526197997] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:50,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781266820] [2023-02-15 11:04:50,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:04:50,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:50,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:50,928 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:50,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-15 11:04:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:50,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 11:04:50,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:51,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:51,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781266820] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:51,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:51,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 50 [2023-02-15 11:04:51,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907231355] [2023-02-15 11:04:51,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:51,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 11:04:51,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:51,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 11:04:51,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1824, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 11:04:51,729 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:52,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:52,233 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2023-02-15 11:04:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-15 11:04:52,233 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-02-15 11:04:52,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:52,234 INFO L225 Difference]: With dead ends: 170 [2023-02-15 11:04:52,234 INFO L226 Difference]: Without dead ends: 97 [2023-02-15 11:04:52,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 142 SyntacticMatches, 47 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2036 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1274, Invalid=4128, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 11:04:52,235 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:52,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 205 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-02-15 11:04:52,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2023-02-15 11:04:52,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-02-15 11:04:52,244 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 95 [2023-02-15 11:04:52,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:52,244 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-02-15 11:04:52,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.94) internal successors, (97), 50 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:52,244 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-02-15 11:04:52,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-15 11:04:52,244 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:52,245 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:52,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:52,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-15 11:04:52,450 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:52,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash 375225836, now seen corresponding path program 44 times [2023-02-15 11:04:52,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:52,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666044128] [2023-02-15 11:04:52,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:52,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:52,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 253 proven. 760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:52,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:52,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666044128] [2023-02-15 11:04:52,918 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666044128] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:52,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517978685] [2023-02-15 11:04:52,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:04:52,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:52,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:52,919 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:52,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-15 11:04:52,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:04:52,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:52,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 11:04:52,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:53,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:53,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 276 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:53,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517978685] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:53,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:53,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 29 [2023-02-15 11:04:53,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008868584] [2023-02-15 11:04:53,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:53,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-15 11:04:53,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:53,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-15 11:04:53,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=479, Unknown=0, NotChecked=0, Total=812 [2023-02-15 11:04:53,554 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:53,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:53,892 INFO L93 Difference]: Finished difference Result 108 states and 109 transitions. [2023-02-15 11:04:53,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-15 11:04:53,892 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2023-02-15 11:04:53,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:53,893 INFO L225 Difference]: With dead ends: 108 [2023-02-15 11:04:53,893 INFO L226 Difference]: Without dead ends: 106 [2023-02-15 11:04:53,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 166 SyntacticMatches, 46 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1033, Invalid=1829, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 11:04:53,894 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:53,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:53,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-02-15 11:04:53,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2023-02-15 11:04:53,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:53,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2023-02-15 11:04:53,908 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 96 [2023-02-15 11:04:53,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:53,908 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2023-02-15 11:04:53,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:53,908 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2023-02-15 11:04:53,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-02-15 11:04:53,909 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:53,909 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:53,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:54,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-15 11:04:54,114 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:54,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:54,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1442170931, now seen corresponding path program 45 times [2023-02-15 11:04:54,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:54,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420832728] [2023-02-15 11:04:54,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:54,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:54,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:54,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420832728] [2023-02-15 11:04:54,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420832728] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:54,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104610791] [2023-02-15 11:04:54,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:04:54,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:54,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:54,949 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:54,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-15 11:04:55,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-02-15 11:04:55,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:55,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 11:04:55,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:55,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:55,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:55,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:55,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104610791] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:55,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:55,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 52 [2023-02-15 11:04:55,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454894817] [2023-02-15 11:04:55,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:55,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-15 11:04:55,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:55,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-15 11:04:55,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1975, Unknown=0, NotChecked=0, Total=2652 [2023-02-15 11:04:55,807 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:56,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:56,371 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2023-02-15 11:04:56,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-15 11:04:56,371 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2023-02-15 11:04:56,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:56,372 INFO L225 Difference]: With dead ends: 177 [2023-02-15 11:04:56,372 INFO L226 Difference]: Without dead ends: 101 [2023-02-15 11:04:56,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 148 SyntacticMatches, 49 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1377, Invalid=4475, Unknown=0, NotChecked=0, Total=5852 [2023-02-15 11:04:56,373 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:56,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 227 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:56,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-15 11:04:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-02-15 11:04:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:56,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-02-15 11:04:56,384 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 99 [2023-02-15 11:04:56,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:56,384 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-02-15 11:04:56,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 52 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-02-15 11:04:56,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-15 11:04:56,385 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:56,385 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:56,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:56,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:56,585 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:56,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:56,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2002329720, now seen corresponding path program 46 times [2023-02-15 11:04:56,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:56,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352845211] [2023-02-15 11:04:56,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:56,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 276 proven. 829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:57,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:57,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352845211] [2023-02-15 11:04:57,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352845211] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:57,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374649046] [2023-02-15 11:04:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:04:57,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:57,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:57,136 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:57,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-15 11:04:57,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:04:57,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:57,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-15 11:04:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:57,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:57,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:04:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 300 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:57,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374649046] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:04:57,824 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:04:57,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 30 [2023-02-15 11:04:57,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048512473] [2023-02-15 11:04:57,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:04:57,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-15 11:04:57,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:04:57,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-15 11:04:57,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=359, Invalid=511, Unknown=0, NotChecked=0, Total=870 [2023-02-15 11:04:57,826 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:58,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:04:58,136 INFO L93 Difference]: Finished difference Result 112 states and 113 transitions. [2023-02-15 11:04:58,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 11:04:58,136 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-02-15 11:04:58,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:04:58,137 INFO L225 Difference]: With dead ends: 112 [2023-02-15 11:04:58,137 INFO L226 Difference]: Without dead ends: 110 [2023-02-15 11:04:58,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 173 SyntacticMatches, 48 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1410 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1113, Invalid=1967, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 11:04:58,138 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:04:58,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 27 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:04:58,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-02-15 11:04:58,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 104. [2023-02-15 11:04:58,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:58,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2023-02-15 11:04:58,153 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 100 [2023-02-15 11:04:58,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:04:58,154 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2023-02-15 11:04:58,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.466666666666667) internal successors, (104), 30 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:04:58,154 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2023-02-15 11:04:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-15 11:04:58,154 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:04:58,155 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1] [2023-02-15 11:04:58,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-02-15 11:04:58,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-15 11:04:58,360 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:04:58,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:04:58,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1400905905, now seen corresponding path program 47 times [2023-02-15 11:04:58,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:04:58,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558428865] [2023-02-15 11:04:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:04:58,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:04:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:04:59,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:59,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:04:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558428865] [2023-02-15 11:04:59,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558428865] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:04:59,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094243861] [2023-02-15 11:04:59,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:04:59,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:04:59,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:04:59,256 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:04:59,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-15 11:04:59,335 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-02-15 11:04:59,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:04:59,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-15 11:04:59,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:04:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:04:59,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:00,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094243861] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:00,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:00,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 54 [2023-02-15 11:05:00,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607948247] [2023-02-15 11:05:00,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:00,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-15 11:05:00,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:00,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-15 11:05:00,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2132, Unknown=0, NotChecked=0, Total=2862 [2023-02-15 11:05:00,169 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:00,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:00,754 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2023-02-15 11:05:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-15 11:05:00,754 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-02-15 11:05:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:00,754 INFO L225 Difference]: With dead ends: 184 [2023-02-15 11:05:00,754 INFO L226 Difference]: Without dead ends: 105 [2023-02-15 11:05:00,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 154 SyntacticMatches, 51 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2389 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1484, Invalid=4836, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 11:05:00,755 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:00,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 175 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:00,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-15 11:05:00,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-15 11:05:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:00,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-02-15 11:05:00,779 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 103 [2023-02-15 11:05:00,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:00,779 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-02-15 11:05:00,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 54 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:00,779 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-02-15 11:05:00,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-15 11:05:00,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:00,780 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:00,786 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:00,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-15 11:05:00,986 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:00,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:00,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1078168852, now seen corresponding path program 48 times [2023-02-15 11:05:00,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:00,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640854830] [2023-02-15 11:05:00,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:01,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:01,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 300 proven. 901 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:01,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640854830] [2023-02-15 11:05:01,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640854830] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046355966] [2023-02-15 11:05:01,511 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:05:01,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:01,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:01,512 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:01,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-15 11:05:01,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2023-02-15 11:05:01,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:01,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 11:05:01,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:01,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:01,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 325 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:02,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046355966] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:02,265 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:02,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 31 [2023-02-15 11:05:02,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366038529] [2023-02-15 11:05:02,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:02,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-15 11:05:02,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:02,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-15 11:05:02,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=544, Unknown=0, NotChecked=0, Total=930 [2023-02-15 11:05:02,266 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:02,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:02,617 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2023-02-15 11:05:02,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-15 11:05:02,617 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-02-15 11:05:02,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:02,618 INFO L225 Difference]: With dead ends: 116 [2023-02-15 11:05:02,618 INFO L226 Difference]: Without dead ends: 114 [2023-02-15 11:05:02,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 180 SyntacticMatches, 50 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1196, Invalid=2110, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 11:05:02,619 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:02,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 35 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:02,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-15 11:05:02,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 108. [2023-02-15 11:05:02,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:02,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2023-02-15 11:05:02,631 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2023-02-15 11:05:02,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:02,631 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2023-02-15 11:05:02,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.4838709677419355) internal successors, (108), 31 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:02,631 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2023-02-15 11:05:02,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-02-15 11:05:02,632 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:02,632 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:02,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:02,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-15 11:05:02,838 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:02,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:02,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1958010163, now seen corresponding path program 49 times [2023-02-15 11:05:02,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:02,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893389718] [2023-02-15 11:05:02,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:02,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:03,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:03,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893389718] [2023-02-15 11:05:03,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893389718] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:03,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455900512] [2023-02-15 11:05:03,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:05:03,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:03,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:03,820 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:03,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-15 11:05:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-15 11:05:03,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:04,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:04,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455900512] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:04,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:04,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 56 [2023-02-15 11:05:04,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587868445] [2023-02-15 11:05:04,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:04,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-15 11:05:04,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:04,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-15 11:05:04,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=2295, Unknown=0, NotChecked=0, Total=3080 [2023-02-15 11:05:04,800 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:05,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:05,451 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2023-02-15 11:05:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-15 11:05:05,451 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-02-15 11:05:05,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:05,452 INFO L225 Difference]: With dead ends: 191 [2023-02-15 11:05:05,452 INFO L226 Difference]: Without dead ends: 109 [2023-02-15 11:05:05,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 160 SyntacticMatches, 53 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2576 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1595, Invalid=5211, Unknown=0, NotChecked=0, Total=6806 [2023-02-15 11:05:05,453 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:05,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 238 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:05:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-02-15 11:05:05,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2023-02-15 11:05:05,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:05,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-02-15 11:05:05,465 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 107 [2023-02-15 11:05:05,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:05,465 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-02-15 11:05:05,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 56 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-02-15 11:05:05,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-15 11:05:05,465 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:05,466 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:05,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:05,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-02-15 11:05:05,669 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:05,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash 5103496, now seen corresponding path program 50 times [2023-02-15 11:05:05,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:05,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591233176] [2023-02-15 11:05:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:05,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 325 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:06,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:06,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591233176] [2023-02-15 11:05:06,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591233176] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:06,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563240614] [2023-02-15 11:05:06,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:05:06,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:06,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:06,222 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:06,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-15 11:05:06,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:05:06,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:06,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 11:05:06,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:06,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 351 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:06,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563240614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:06,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:06,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 32 [2023-02-15 11:05:06,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317714147] [2023-02-15 11:05:06,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:06,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 11:05:06,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:06,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 11:05:06,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=578, Unknown=0, NotChecked=0, Total=992 [2023-02-15 11:05:06,976 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:07,322 INFO L93 Difference]: Finished difference Result 120 states and 121 transitions. [2023-02-15 11:05:07,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 11:05:07,323 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-02-15 11:05:07,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:07,323 INFO L225 Difference]: With dead ends: 120 [2023-02-15 11:05:07,323 INFO L226 Difference]: Without dead ends: 118 [2023-02-15 11:05:07,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 187 SyntacticMatches, 52 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1282, Invalid=2258, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 11:05:07,324 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 112 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:07,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 29 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:07,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-02-15 11:05:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2023-02-15 11:05:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2023-02-15 11:05:07,340 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 108 [2023-02-15 11:05:07,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:07,341 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2023-02-15 11:05:07,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.5) internal successors, (112), 32 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:07,341 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2023-02-15 11:05:07,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-15 11:05:07,341 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:07,341 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:07,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:07,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:07,542 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:07,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:07,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1719214257, now seen corresponding path program 51 times [2023-02-15 11:05:07,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:07,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838667120] [2023-02-15 11:05:07,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:07,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:07,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:08,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:08,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838667120] [2023-02-15 11:05:08,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838667120] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:08,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558059816] [2023-02-15 11:05:08,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:05:08,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:08,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:08,565 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:08,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-15 11:05:08,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2023-02-15 11:05:08,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:08,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-15 11:05:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:08,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:09,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:09,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558059816] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:09,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:09,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 58 [2023-02-15 11:05:09,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943699174] [2023-02-15 11:05:09,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:09,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-15 11:05:09,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:09,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-15 11:05:09,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2464, Unknown=0, NotChecked=0, Total=3306 [2023-02-15 11:05:09,647 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:10,269 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2023-02-15 11:05:10,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-15 11:05:10,269 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-02-15 11:05:10,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:10,270 INFO L225 Difference]: With dead ends: 198 [2023-02-15 11:05:10,270 INFO L226 Difference]: Without dead ends: 113 [2023-02-15 11:05:10,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 166 SyntacticMatches, 55 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2770 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1710, Invalid=5600, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 11:05:10,271 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:10,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 208 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-15 11:05:10,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2023-02-15 11:05:10,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-02-15 11:05:10,287 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 111 [2023-02-15 11:05:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:10,288 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-02-15 11:05:10,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 58 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:10,288 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-02-15 11:05:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-15 11:05:10,288 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:10,288 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:10,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:10,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-02-15 11:05:10,493 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:10,493 INFO L85 PathProgramCache]: Analyzing trace with hash -301398036, now seen corresponding path program 52 times [2023-02-15 11:05:10,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:10,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004535209] [2023-02-15 11:05:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:10,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 351 proven. 1054 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:11,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004535209] [2023-02-15 11:05:11,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004535209] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:11,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577181329] [2023-02-15 11:05:11,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:05:11,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:11,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:11,088 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:11,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-15 11:05:11,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:05:11,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:11,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 11:05:11,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:11,276 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:11,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 378 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:11,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577181329] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:11,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:11,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 33 [2023-02-15 11:05:11,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285257704] [2023-02-15 11:05:11,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:11,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 11:05:11,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:11,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 11:05:11,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 11:05:11,863 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:12,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:12,234 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2023-02-15 11:05:12,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-15 11:05:12,234 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2023-02-15 11:05:12,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:12,235 INFO L225 Difference]: With dead ends: 124 [2023-02-15 11:05:12,235 INFO L226 Difference]: Without dead ends: 122 [2023-02-15 11:05:12,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 194 SyntacticMatches, 54 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1749 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1371, Invalid=2411, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 11:05:12,236 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 118 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:12,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 27 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-15 11:05:12,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 116. [2023-02-15 11:05:12,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:12,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2023-02-15 11:05:12,255 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 112 [2023-02-15 11:05:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:12,255 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2023-02-15 11:05:12,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.515151515151515) internal successors, (116), 33 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2023-02-15 11:05:12,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-02-15 11:05:12,256 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:12,256 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:12,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:12,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:12,462 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:12,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:12,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1832545741, now seen corresponding path program 53 times [2023-02-15 11:05:12,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:12,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088169584] [2023-02-15 11:05:12,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:12,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:13,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:13,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:13,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088169584] [2023-02-15 11:05:13,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088169584] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:13,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872434509] [2023-02-15 11:05:13,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:05:13,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:13,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:13,585 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:13,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-15 11:05:13,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2023-02-15 11:05:13,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:13,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-15 11:05:13,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:13,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:14,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:14,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872434509] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:14,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:14,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 60 [2023-02-15 11:05:14,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401627885] [2023-02-15 11:05:14,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:14,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-15 11:05:14,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:14,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-15 11:05:14,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=2639, Unknown=0, NotChecked=0, Total=3540 [2023-02-15 11:05:14,689 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:15,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:15,367 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2023-02-15 11:05:15,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-15 11:05:15,367 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2023-02-15 11:05:15,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:15,368 INFO L225 Difference]: With dead ends: 205 [2023-02-15 11:05:15,368 INFO L226 Difference]: Without dead ends: 117 [2023-02-15 11:05:15,369 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 172 SyntacticMatches, 57 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2971 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1829, Invalid=6003, Unknown=0, NotChecked=0, Total=7832 [2023-02-15 11:05:15,369 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:15,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 234 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-02-15 11:05:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-02-15 11:05:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:15,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2023-02-15 11:05:15,388 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 115 [2023-02-15 11:05:15,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:15,389 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2023-02-15 11:05:15,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.95) internal successors, (117), 60 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:15,389 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2023-02-15 11:05:15,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-15 11:05:15,390 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:15,390 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:15,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-02-15 11:05:15,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:15,597 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:15,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:15,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1337868168, now seen corresponding path program 54 times [2023-02-15 11:05:15,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:15,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34492662] [2023-02-15 11:05:15,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:15,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:16,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 378 proven. 1135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:16,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:16,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34492662] [2023-02-15 11:05:16,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34492662] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:16,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299345081] [2023-02-15 11:05:16,226 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:05:16,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:16,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:16,227 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:16,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-02-15 11:05:16,317 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2023-02-15 11:05:16,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:16,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-15 11:05:16,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:16,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 406 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:17,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299345081] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:17,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:17,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 34 [2023-02-15 11:05:17,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577331449] [2023-02-15 11:05:17,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:17,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-15 11:05:17,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:17,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-15 11:05:17,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=649, Unknown=0, NotChecked=0, Total=1122 [2023-02-15 11:05:17,124 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:17,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:17,506 INFO L93 Difference]: Finished difference Result 128 states and 129 transitions. [2023-02-15 11:05:17,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-15 11:05:17,506 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-02-15 11:05:17,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:17,507 INFO L225 Difference]: With dead ends: 128 [2023-02-15 11:05:17,507 INFO L226 Difference]: Without dead ends: 126 [2023-02-15 11:05:17,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 201 SyntacticMatches, 56 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1870 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1463, Invalid=2569, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 11:05:17,508 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 120 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:17,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 26 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:17,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-15 11:05:17,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 120. [2023-02-15 11:05:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2023-02-15 11:05:17,532 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2023-02-15 11:05:17,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:17,533 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2023-02-15 11:05:17,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5294117647058822) internal successors, (120), 34 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:17,533 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2023-02-15 11:05:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-15 11:05:17,534 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:17,534 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:17,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:17,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:17,739 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:17,739 INFO L85 PathProgramCache]: Analyzing trace with hash -861093711, now seen corresponding path program 55 times [2023-02-15 11:05:17,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045140102] [2023-02-15 11:05:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:17,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:18,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:18,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:18,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045140102] [2023-02-15 11:05:18,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045140102] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:18,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491101940] [2023-02-15 11:05:18,906 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:05:18,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:18,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:18,907 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:18,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-02-15 11:05:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:18,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-15 11:05:18,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:19,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:20,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491101940] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:20,110 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:20,110 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 62 [2023-02-15 11:05:20,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400104091] [2023-02-15 11:05:20,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:20,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-15 11:05:20,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:20,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-15 11:05:20,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2820, Unknown=0, NotChecked=0, Total=3782 [2023-02-15 11:05:20,111 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:20,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:20,892 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2023-02-15 11:05:20,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-15 11:05:20,893 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2023-02-15 11:05:20,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:20,894 INFO L225 Difference]: With dead ends: 212 [2023-02-15 11:05:20,894 INFO L226 Difference]: Without dead ends: 121 [2023-02-15 11:05:20,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 178 SyntacticMatches, 59 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3179 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1952, Invalid=6420, Unknown=0, NotChecked=0, Total=8372 [2023-02-15 11:05:20,895 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:20,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 258 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:05:20,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-02-15 11:05:20,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-02-15 11:05:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:20,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-02-15 11:05:20,915 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 119 [2023-02-15 11:05:20,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:20,915 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-02-15 11:05:20,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 62 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:20,916 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-02-15 11:05:20,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-15 11:05:20,916 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:20,916 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:20,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:21,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:21,121 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:21,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1093352684, now seen corresponding path program 56 times [2023-02-15 11:05:21,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:21,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674655370] [2023-02-15 11:05:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:21,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:21,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 406 proven. 1219 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:21,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674655370] [2023-02-15 11:05:21,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674655370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:21,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836091652] [2023-02-15 11:05:21,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:05:21,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:21,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:21,841 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:21,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-02-15 11:05:21,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:05:21,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:21,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 11:05:21,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:22,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:22,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 435 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:22,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836091652] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:22,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:22,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 35 [2023-02-15 11:05:22,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831173008] [2023-02-15 11:05:22,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:22,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 11:05:22,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:22,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 11:05:22,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=504, Invalid=686, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 11:05:22,729 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:23,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:23,179 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2023-02-15 11:05:23,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-15 11:05:23,180 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2023-02-15 11:05:23,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:23,180 INFO L225 Difference]: With dead ends: 132 [2023-02-15 11:05:23,180 INFO L226 Difference]: Without dead ends: 130 [2023-02-15 11:05:23,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 208 SyntacticMatches, 58 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1995 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1558, Invalid=2732, Unknown=0, NotChecked=0, Total=4290 [2023-02-15 11:05:23,181 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:23,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 30 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:23,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-02-15 11:05:23,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2023-02-15 11:05:23,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2023-02-15 11:05:23,195 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 120 [2023-02-15 11:05:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:23,196 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2023-02-15 11:05:23,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5428571428571427) internal successors, (124), 35 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:23,196 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2023-02-15 11:05:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-15 11:05:23,197 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:23,197 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:23,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:23,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-02-15 11:05:23,402 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:23,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:23,402 INFO L85 PathProgramCache]: Analyzing trace with hash -957343539, now seen corresponding path program 57 times [2023-02-15 11:05:23,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:23,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221939549] [2023-02-15 11:05:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:23,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:24,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:24,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221939549] [2023-02-15 11:05:24,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221939549] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:24,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078972814] [2023-02-15 11:05:24,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:05:24,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:24,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:24,652 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:24,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-02-15 11:05:24,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2023-02-15 11:05:24,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:24,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-15 11:05:24,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:24,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:24,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:25,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078972814] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:25,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:25,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 64 [2023-02-15 11:05:25,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569800586] [2023-02-15 11:05:25,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:25,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-15 11:05:25,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:25,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-15 11:05:25,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 11:05:25,882 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:26,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:26,697 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2023-02-15 11:05:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-15 11:05:26,698 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2023-02-15 11:05:26,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:26,698 INFO L225 Difference]: With dead ends: 219 [2023-02-15 11:05:26,698 INFO L226 Difference]: Without dead ends: 125 [2023-02-15 11:05:26,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 184 SyntacticMatches, 61 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3394 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2079, Invalid=6851, Unknown=0, NotChecked=0, Total=8930 [2023-02-15 11:05:26,699 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:26,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 291 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:05:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-15 11:05:26,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-02-15 11:05:26,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:26,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2023-02-15 11:05:26,714 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 123 [2023-02-15 11:05:26,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:26,715 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2023-02-15 11:05:26,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.953125) internal successors, (125), 64 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:26,715 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2023-02-15 11:05:26,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-15 11:05:26,716 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:26,716 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:26,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:26,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-02-15 11:05:26,922 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:26,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1559232632, now seen corresponding path program 58 times [2023-02-15 11:05:26,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:26,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608588651] [2023-02-15 11:05:26,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:26,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:27,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 435 proven. 1306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:27,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:27,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608588651] [2023-02-15 11:05:27,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608588651] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:27,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414206614] [2023-02-15 11:05:27,678 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:05:27,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:27,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:27,679 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:27,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-02-15 11:05:27,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:05:27,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:27,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-15 11:05:27,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:27,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:27,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:28,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 465 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:28,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414206614] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:28,598 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:28,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 36 [2023-02-15 11:05:28,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689932420] [2023-02-15 11:05:28,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:28,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 11:05:28,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:28,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 11:05:28,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=724, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 11:05:28,600 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:29,066 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2023-02-15 11:05:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-15 11:05:29,067 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2023-02-15 11:05:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:29,067 INFO L225 Difference]: With dead ends: 136 [2023-02-15 11:05:29,067 INFO L226 Difference]: Without dead ends: 134 [2023-02-15 11:05:29,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 215 SyntacticMatches, 60 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1656, Invalid=2900, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 11:05:29,068 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 130 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:29,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 28 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:29,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2023-02-15 11:05:29,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2023-02-15 11:05:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2023-02-15 11:05:29,091 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 124 [2023-02-15 11:05:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:29,092 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2023-02-15 11:05:29,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.5555555555555554) internal successors, (128), 36 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:29,092 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2023-02-15 11:05:29,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-02-15 11:05:29,093 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:29,093 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:29,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:29,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-15 11:05:29,299 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:29,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:29,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1023213391, now seen corresponding path program 59 times [2023-02-15 11:05:29,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:29,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511131404] [2023-02-15 11:05:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:29,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:29,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:30,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:30,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:30,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511131404] [2023-02-15 11:05:30,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511131404] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:30,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412381788] [2023-02-15 11:05:30,620 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:05:30,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:30,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:30,622 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:30,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-02-15 11:05:30,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-02-15 11:05:30,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:30,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-15 11:05:30,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:30,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:31,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:31,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412381788] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:31,903 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:31,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 66 [2023-02-15 11:05:31,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698449681] [2023-02-15 11:05:31,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:31,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-02-15 11:05:31,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:31,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-02-15 11:05:31,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=3200, Unknown=0, NotChecked=0, Total=4290 [2023-02-15 11:05:31,905 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:32,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:32,745 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2023-02-15 11:05:32,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-15 11:05:32,746 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2023-02-15 11:05:32,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:32,746 INFO L225 Difference]: With dead ends: 226 [2023-02-15 11:05:32,747 INFO L226 Difference]: Without dead ends: 129 [2023-02-15 11:05:32,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 190 SyntacticMatches, 63 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2210, Invalid=7296, Unknown=0, NotChecked=0, Total=9506 [2023-02-15 11:05:32,747 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:32,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 292 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:05:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-02-15 11:05:32,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2023-02-15 11:05:32,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:32,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-02-15 11:05:32,763 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 127 [2023-02-15 11:05:32,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:32,763 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-02-15 11:05:32,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 66 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:32,763 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-02-15 11:05:32,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-15 11:05:32,763 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:32,763 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:32,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:32,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:32,964 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:32,964 INFO L85 PathProgramCache]: Analyzing trace with hash 722145772, now seen corresponding path program 60 times [2023-02-15 11:05:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:32,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481304953] [2023-02-15 11:05:32,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:32,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 465 proven. 1396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:33,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:33,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481304953] [2023-02-15 11:05:33,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481304953] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:33,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804826773] [2023-02-15 11:05:33,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:05:33,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:33,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:33,726 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:33,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-02-15 11:05:33,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2023-02-15 11:05:33,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:33,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 11:05:33,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:33,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 496 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:34,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804826773] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:34,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:34,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 37 [2023-02-15 11:05:34,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811285796] [2023-02-15 11:05:34,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:34,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 11:05:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:34,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 11:05:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=569, Invalid=763, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 11:05:34,762 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:35,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:35,194 INFO L93 Difference]: Finished difference Result 140 states and 141 transitions. [2023-02-15 11:05:35,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 11:05:35,194 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-02-15 11:05:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:35,195 INFO L225 Difference]: With dead ends: 140 [2023-02-15 11:05:35,195 INFO L226 Difference]: Without dead ends: 138 [2023-02-15 11:05:35,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 222 SyntacticMatches, 62 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1757, Invalid=3073, Unknown=0, NotChecked=0, Total=4830 [2023-02-15 11:05:35,196 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 132 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:35,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 23 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:35,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-15 11:05:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 132. [2023-02-15 11:05:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2023-02-15 11:05:35,212 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2023-02-15 11:05:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:35,212 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2023-02-15 11:05:35,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.5675675675675675) internal successors, (132), 37 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2023-02-15 11:05:35,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-02-15 11:05:35,212 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:35,212 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:35,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2023-02-15 11:05:35,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:35,413 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:35,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:35,413 INFO L85 PathProgramCache]: Analyzing trace with hash -41671731, now seen corresponding path program 61 times [2023-02-15 11:05:35,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:35,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693442564] [2023-02-15 11:05:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:35,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:36,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:36,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693442564] [2023-02-15 11:05:36,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693442564] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:36,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668014076] [2023-02-15 11:05:36,828 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:05:36,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:36,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:36,830 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:36,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-02-15 11:05:36,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-15 11:05:36,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:37,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:37,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:38,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668014076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:38,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:38,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 68 [2023-02-15 11:05:38,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597288383] [2023-02-15 11:05:38,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:38,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-15 11:05:38,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:38,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-15 11:05:38,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1157, Invalid=3399, Unknown=0, NotChecked=0, Total=4556 [2023-02-15 11:05:38,169 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:39,019 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2023-02-15 11:05:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-15 11:05:39,019 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2023-02-15 11:05:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:39,020 INFO L225 Difference]: With dead ends: 233 [2023-02-15 11:05:39,020 INFO L226 Difference]: Without dead ends: 133 [2023-02-15 11:05:39,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 196 SyntacticMatches, 65 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3845 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2345, Invalid=7755, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 11:05:39,020 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:39,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 261 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:05:39,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-15 11:05:39,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-02-15 11:05:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-02-15 11:05:39,037 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 131 [2023-02-15 11:05:39,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:39,037 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-02-15 11:05:39,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 68 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:39,037 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-02-15 11:05:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-15 11:05:39,038 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:39,038 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:39,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:39,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:39,241 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:39,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:39,241 INFO L85 PathProgramCache]: Analyzing trace with hash 341516168, now seen corresponding path program 62 times [2023-02-15 11:05:39,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:39,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946281733] [2023-02-15 11:05:39,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:39,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:39,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 496 proven. 1489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:40,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:40,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946281733] [2023-02-15 11:05:40,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946281733] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:40,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696252827] [2023-02-15 11:05:40,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:05:40,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:40,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:40,109 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:40,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-02-15 11:05:40,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:05:40,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:40,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 11:05:40,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:40,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:40,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:41,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 528 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:41,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696252827] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:41,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:41,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 38 [2023-02-15 11:05:41,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573382785] [2023-02-15 11:05:41,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:41,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 11:05:41,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:41,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 11:05:41,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=803, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 11:05:41,185 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:41,673 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2023-02-15 11:05:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-15 11:05:41,674 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-02-15 11:05:41,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:41,674 INFO L225 Difference]: With dead ends: 144 [2023-02-15 11:05:41,674 INFO L226 Difference]: Without dead ends: 142 [2023-02-15 11:05:41,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 229 SyntacticMatches, 64 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1861, Invalid=3251, Unknown=0, NotChecked=0, Total=5112 [2023-02-15 11:05:41,675 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 136 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:41,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 32 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:41,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-02-15 11:05:41,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 136. [2023-02-15 11:05:41,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:41,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2023-02-15 11:05:41,702 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 132 [2023-02-15 11:05:41,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:41,702 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2023-02-15 11:05:41,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.5789473684210527) internal successors, (136), 38 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:41,702 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2023-02-15 11:05:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-02-15 11:05:41,703 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:41,703 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:41,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-02-15 11:05:41,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2023-02-15 11:05:41,909 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:41,910 INFO L85 PathProgramCache]: Analyzing trace with hash -664543055, now seen corresponding path program 63 times [2023-02-15 11:05:41,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:41,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793820246] [2023-02-15 11:05:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:41,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:41,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:43,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:43,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793820246] [2023-02-15 11:05:43,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793820246] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:43,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297902505] [2023-02-15 11:05:43,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:05:43,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:43,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:43,408 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:43,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-02-15 11:05:43,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2023-02-15 11:05:43,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:43,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 11:05:43,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:43,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1552 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:44,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297902505] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:44,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:44,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 70 [2023-02-15 11:05:44,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809543653] [2023-02-15 11:05:44,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:44,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-15 11:05:44,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-15 11:05:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1226, Invalid=3604, Unknown=0, NotChecked=0, Total=4830 [2023-02-15 11:05:44,848 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:45,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:45,727 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2023-02-15 11:05:45,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-15 11:05:45,727 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-02-15 11:05:45,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:45,728 INFO L225 Difference]: With dead ends: 240 [2023-02-15 11:05:45,728 INFO L226 Difference]: Without dead ends: 137 [2023-02-15 11:05:45,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 202 SyntacticMatches, 67 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4081 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2484, Invalid=8228, Unknown=0, NotChecked=0, Total=10712 [2023-02-15 11:05:45,729 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:45,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 253 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:05:45,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-02-15 11:05:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2023-02-15 11:05:45,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:45,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2023-02-15 11:05:45,754 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 135 [2023-02-15 11:05:45,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:45,754 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2023-02-15 11:05:45,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.957142857142857) internal successors, (137), 70 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:45,755 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2023-02-15 11:05:45,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-02-15 11:05:45,755 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:45,755 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:45,761 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:45,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:45,961 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:45,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:45,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1871742700, now seen corresponding path program 64 times [2023-02-15 11:05:45,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:45,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390096167] [2023-02-15 11:05:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:45,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:45,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:46,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 528 proven. 1585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:46,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390096167] [2023-02-15 11:05:46,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390096167] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:46,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200183109] [2023-02-15 11:05:46,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:05:46,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:46,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:46,818 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:46,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-02-15 11:05:46,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:05:46,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:46,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-15 11:05:46,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:47,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:47,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2113 backedges. 561 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:47,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200183109] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:47,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:47,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 39 [2023-02-15 11:05:47,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547194847] [2023-02-15 11:05:47,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:47,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 11:05:47,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:47,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 11:05:47,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=844, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 11:05:47,878 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:48,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:48,356 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2023-02-15 11:05:48,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-15 11:05:48,357 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2023-02-15 11:05:48,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:48,357 INFO L225 Difference]: With dead ends: 148 [2023-02-15 11:05:48,357 INFO L226 Difference]: Without dead ends: 146 [2023-02-15 11:05:48,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 236 SyntacticMatches, 66 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2535 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1968, Invalid=3434, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 11:05:48,358 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 140 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:48,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 33 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:48,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-02-15 11:05:48,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 140. [2023-02-15 11:05:48,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:48,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2023-02-15 11:05:48,376 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 136 [2023-02-15 11:05:48,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:48,376 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2023-02-15 11:05:48,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.58974358974359) internal successors, (140), 39 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:48,376 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2023-02-15 11:05:48,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-02-15 11:05:48,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:48,377 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:48,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:48,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-02-15 11:05:48,577 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash -468807987, now seen corresponding path program 65 times [2023-02-15 11:05:48,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:48,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512670198] [2023-02-15 11:05:48,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:48,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:50,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:50,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512670198] [2023-02-15 11:05:50,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512670198] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:50,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904309908] [2023-02-15 11:05:50,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:05:50,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:50,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:50,144 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:50,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-02-15 11:05:50,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2023-02-15 11:05:50,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:50,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-15 11:05:50,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:50,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:50,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:51,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 1650 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:51,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904309908] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:51,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:51,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 72 [2023-02-15 11:05:51,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654055072] [2023-02-15 11:05:51,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:51,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-02-15 11:05:51,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:51,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-02-15 11:05:51,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1297, Invalid=3815, Unknown=0, NotChecked=0, Total=5112 [2023-02-15 11:05:51,629 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:52,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:52,531 INFO L93 Difference]: Finished difference Result 247 states and 249 transitions. [2023-02-15 11:05:52,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-15 11:05:52,531 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-02-15 11:05:52,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:52,532 INFO L225 Difference]: With dead ends: 247 [2023-02-15 11:05:52,532 INFO L226 Difference]: Without dead ends: 141 [2023-02-15 11:05:52,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 208 SyntacticMatches, 69 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4324 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2627, Invalid=8715, Unknown=0, NotChecked=0, Total=11342 [2023-02-15 11:05:52,533 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:52,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 227 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:05:52,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-02-15 11:05:52,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-02-15 11:05:52,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:52,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2023-02-15 11:05:52,560 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 139 [2023-02-15 11:05:52,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:52,560 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2023-02-15 11:05:52,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 72 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:52,560 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2023-02-15 11:05:52,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-02-15 11:05:52,561 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:52,561 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:52,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:52,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-02-15 11:05:52,761 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:52,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:52,761 INFO L85 PathProgramCache]: Analyzing trace with hash 733454216, now seen corresponding path program 66 times [2023-02-15 11:05:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:52,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436705057] [2023-02-15 11:05:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:52,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 561 proven. 1684 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:53,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:53,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436705057] [2023-02-15 11:05:53,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436705057] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:53,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115153229] [2023-02-15 11:05:53,694 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:05:53,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:53,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:53,695 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:53,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-02-15 11:05:53,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2023-02-15 11:05:53,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:05:53,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-15 11:05:53,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:53,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2245 backedges. 595 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:54,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115153229] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:54,821 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:54,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 40 [2023-02-15 11:05:54,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229465834] [2023-02-15 11:05:54,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:54,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-15 11:05:54,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:54,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-15 11:05:54,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 11:05:54,823 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:55,319 INFO L93 Difference]: Finished difference Result 152 states and 153 transitions. [2023-02-15 11:05:55,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-15 11:05:55,319 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2023-02-15 11:05:55,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:55,320 INFO L225 Difference]: With dead ends: 152 [2023-02-15 11:05:55,320 INFO L226 Difference]: Without dead ends: 150 [2023-02-15 11:05:55,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 243 SyntacticMatches, 68 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2078, Invalid=3622, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 11:05:55,321 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:55,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 36 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:05:55,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-15 11:05:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2023-02-15 11:05:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:55,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2023-02-15 11:05:55,348 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2023-02-15 11:05:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:55,348 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2023-02-15 11:05:55,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.6) internal successors, (144), 40 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2023-02-15 11:05:55,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-02-15 11:05:55,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:55,349 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:55,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-02-15 11:05:55,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-02-15 11:05:55,555 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:55,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1840734385, now seen corresponding path program 67 times [2023-02-15 11:05:55,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:55,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841909532] [2023-02-15 11:05:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:55,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:05:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:57,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:57,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:05:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841909532] [2023-02-15 11:05:57,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841909532] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:05:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514414755] [2023-02-15 11:05:57,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:05:57,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:05:57,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:05:57,243 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:05:57,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-02-15 11:05:57,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:05:57,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-15 11:05:57,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:05:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:57,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:05:58,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 1751 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:05:58,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514414755] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:05:58,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:05:58,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 74 [2023-02-15 11:05:58,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596595591] [2023-02-15 11:05:58,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:05:58,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-15 11:05:58,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:05:58,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-15 11:05:58,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1370, Invalid=4032, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 11:05:58,781 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:59,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:05:59,753 INFO L93 Difference]: Finished difference Result 254 states and 256 transitions. [2023-02-15 11:05:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-15 11:05:59,754 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-02-15 11:05:59,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:05:59,754 INFO L225 Difference]: With dead ends: 254 [2023-02-15 11:05:59,754 INFO L226 Difference]: Without dead ends: 145 [2023-02-15 11:05:59,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 214 SyntacticMatches, 71 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4574 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2774, Invalid=9216, Unknown=0, NotChecked=0, Total=11990 [2023-02-15 11:05:59,755 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:05:59,755 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 283 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:05:59,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-02-15 11:05:59,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2023-02-15 11:05:59,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0138888888888888) internal successors, (146), 144 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2023-02-15 11:05:59,786 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 143 [2023-02-15 11:05:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:05:59,786 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2023-02-15 11:05:59,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 74 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:05:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2023-02-15 11:05:59,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-02-15 11:05:59,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:05:59,787 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 34, 34, 1, 1, 1, 1, 1, 1] [2023-02-15 11:05:59,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2023-02-15 11:05:59,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-02-15 11:05:59,987 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:05:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:05:59,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1532781588, now seen corresponding path program 68 times [2023-02-15 11:05:59,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:05:59,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121782810] [2023-02-15 11:05:59,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:05:59,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:00,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 595 proven. 1786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:00,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:00,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121782810] [2023-02-15 11:06:00,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121782810] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:00,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849369439] [2023-02-15 11:06:00,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:06:00,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:00,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:00,972 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:00,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-02-15 11:06:01,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:06:01,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:01,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-15 11:06:01,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:01,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:02,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2381 backedges. 630 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:02,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849369439] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:02,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:02,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 41 [2023-02-15 11:06:02,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100967853] [2023-02-15 11:06:02,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:02,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-15 11:06:02,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:02,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-15 11:06:02,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=711, Invalid=929, Unknown=0, NotChecked=0, Total=1640 [2023-02-15 11:06:02,140 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:02,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:02,660 INFO L93 Difference]: Finished difference Result 156 states and 157 transitions. [2023-02-15 11:06:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-15 11:06:02,660 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2023-02-15 11:06:02,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:02,661 INFO L225 Difference]: With dead ends: 156 [2023-02-15 11:06:02,661 INFO L226 Difference]: Without dead ends: 154 [2023-02-15 11:06:02,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 250 SyntacticMatches, 70 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2829 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2191, Invalid=3815, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 11:06:02,662 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:02,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 37 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:06:02,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-02-15 11:06:02,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 148. [2023-02-15 11:06:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:02,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2023-02-15 11:06:02,689 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 144 [2023-02-15 11:06:02,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:02,689 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2023-02-15 11:06:02,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.6097560975609757) internal successors, (148), 41 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:02,690 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2023-02-15 11:06:02,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-02-15 11:06:02,690 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:02,690 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:02,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2023-02-15 11:06:02,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:02,896 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:02,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1000823245, now seen corresponding path program 69 times [2023-02-15 11:06:02,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:02,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390290094] [2023-02-15 11:06:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:02,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:04,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:04,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390290094] [2023-02-15 11:06:04,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390290094] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:04,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783078099] [2023-02-15 11:06:04,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:06:04,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:04,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:04,661 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:04,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-02-15 11:06:04,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2023-02-15 11:06:04,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:04,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-15 11:06:04,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:04,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:06,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 1855 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:06,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783078099] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:06,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:06,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 76 [2023-02-15 11:06:06,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75785857] [2023-02-15 11:06:06,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:06,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-02-15 11:06:06,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-02-15 11:06:06,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1445, Invalid=4255, Unknown=0, NotChecked=0, Total=5700 [2023-02-15 11:06:06,392 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:07,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:07,481 INFO L93 Difference]: Finished difference Result 261 states and 263 transitions. [2023-02-15 11:06:07,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-02-15 11:06:07,482 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2023-02-15 11:06:07,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:07,482 INFO L225 Difference]: With dead ends: 261 [2023-02-15 11:06:07,482 INFO L226 Difference]: Without dead ends: 149 [2023-02-15 11:06:07,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 220 SyntacticMatches, 73 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4831 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2925, Invalid=9731, Unknown=0, NotChecked=0, Total=12656 [2023-02-15 11:06:07,483 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:07,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 408 Invalid, 792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:07,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2023-02-15 11:06:07,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2023-02-15 11:06:07,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:07,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 150 transitions. [2023-02-15 11:06:07,503 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 150 transitions. Word has length 147 [2023-02-15 11:06:07,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:07,503 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 150 transitions. [2023-02-15 11:06:07,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 76 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:07,503 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 150 transitions. [2023-02-15 11:06:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-02-15 11:06:07,503 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:07,504 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:07,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-02-15 11:06:07,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:07,704 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:07,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:07,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1597865864, now seen corresponding path program 70 times [2023-02-15 11:06:07,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:07,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344196012] [2023-02-15 11:06:07,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:07,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:07,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 630 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344196012] [2023-02-15 11:06:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344196012] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188229421] [2023-02-15 11:06:08,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:06:08,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:08,712 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:08,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2023-02-15 11:06:08,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:06:08,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:08,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-15 11:06:08,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:08,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:08,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:10,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2521 backedges. 666 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:10,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188229421] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:10,016 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:10,016 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 42 [2023-02-15 11:06:10,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298925360] [2023-02-15 11:06:10,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:10,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-15 11:06:10,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-15 11:06:10,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=973, Unknown=0, NotChecked=0, Total=1722 [2023-02-15 11:06:10,017 INFO L87 Difference]: Start difference. First operand 149 states and 150 transitions. Second operand has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:10,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:10,552 INFO L93 Difference]: Finished difference Result 160 states and 161 transitions. [2023-02-15 11:06:10,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-15 11:06:10,553 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2023-02-15 11:06:10,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:10,553 INFO L225 Difference]: With dead ends: 160 [2023-02-15 11:06:10,553 INFO L226 Difference]: Without dead ends: 158 [2023-02-15 11:06:10,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 257 SyntacticMatches, 72 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2982 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2307, Invalid=4013, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 11:06:10,554 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 154 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:10,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 31 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:06:10,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-02-15 11:06:10,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 152. [2023-02-15 11:06:10,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2023-02-15 11:06:10,575 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 148 [2023-02-15 11:06:10,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:10,575 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2023-02-15 11:06:10,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.619047619047619) internal successors, (152), 42 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:10,575 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2023-02-15 11:06:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-02-15 11:06:10,575 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:10,575 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:10,580 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2023-02-15 11:06:10,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:10,776 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:10,776 INFO L85 PathProgramCache]: Analyzing trace with hash 904233137, now seen corresponding path program 71 times [2023-02-15 11:06:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:10,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201180952] [2023-02-15 11:06:10,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:10,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:12,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:12,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:12,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201180952] [2023-02-15 11:06:12,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201180952] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:12,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676529635] [2023-02-15 11:06:12,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:06:12,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:12,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:12,645 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:12,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2023-02-15 11:06:12,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2023-02-15 11:06:12,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-15 11:06:12,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:12,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:12,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:14,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 1962 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:14,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676529635] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:14,394 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:14,394 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 78 [2023-02-15 11:06:14,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617421716] [2023-02-15 11:06:14,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:14,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-02-15 11:06:14,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:14,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-02-15 11:06:14,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1522, Invalid=4484, Unknown=0, NotChecked=0, Total=6006 [2023-02-15 11:06:14,395 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:15,480 INFO L93 Difference]: Finished difference Result 268 states and 270 transitions. [2023-02-15 11:06:15,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-02-15 11:06:15,481 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2023-02-15 11:06:15,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:15,481 INFO L225 Difference]: With dead ends: 268 [2023-02-15 11:06:15,481 INFO L226 Difference]: Without dead ends: 153 [2023-02-15 11:06:15,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 226 SyntacticMatches, 75 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5095 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3080, Invalid=10260, Unknown=0, NotChecked=0, Total=13340 [2023-02-15 11:06:15,482 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:15,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 299 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:15,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-02-15 11:06:15,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2023-02-15 11:06:15,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2023-02-15 11:06:15,513 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 151 [2023-02-15 11:06:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:15,514 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2023-02-15 11:06:15,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 78 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:15,514 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2023-02-15 11:06:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-02-15 11:06:15,515 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:15,515 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 36, 36, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:15,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2023-02-15 11:06:15,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2023-02-15 11:06:15,720 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:15,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:15,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1305718548, now seen corresponding path program 72 times [2023-02-15 11:06:15,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:15,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263044143] [2023-02-15 11:06:15,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:15,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:15,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:16,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 666 proven. 1999 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:16,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263044143] [2023-02-15 11:06:16,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263044143] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608857646] [2023-02-15 11:06:16,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:06:16,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:16,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:16,781 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:16,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2023-02-15 11:06:16,906 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2023-02-15 11:06:16,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:16,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-15 11:06:16,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:17,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:17,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 2665 backedges. 703 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:18,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608857646] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:18,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:18,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 43 [2023-02-15 11:06:18,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232616780] [2023-02-15 11:06:18,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:18,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-15 11:06:18,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:18,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-15 11:06:18,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=788, Invalid=1018, Unknown=0, NotChecked=0, Total=1806 [2023-02-15 11:06:18,091 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:18,686 INFO L93 Difference]: Finished difference Result 164 states and 165 transitions. [2023-02-15 11:06:18,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-15 11:06:18,686 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2023-02-15 11:06:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:18,687 INFO L225 Difference]: With dead ends: 164 [2023-02-15 11:06:18,687 INFO L226 Difference]: Without dead ends: 162 [2023-02-15 11:06:18,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 264 SyntacticMatches, 74 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3139 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2426, Invalid=4216, Unknown=0, NotChecked=0, Total=6642 [2023-02-15 11:06:18,688 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 158 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:18,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 29 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:18,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-15 11:06:18,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 156. [2023-02-15 11:06:18,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:18,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2023-02-15 11:06:18,713 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2023-02-15 11:06:18,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:18,714 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2023-02-15 11:06:18,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.627906976744186) internal successors, (156), 43 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:18,714 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2023-02-15 11:06:18,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-02-15 11:06:18,714 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:18,714 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:18,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2023-02-15 11:06:18,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:18,915 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:18,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash 862356685, now seen corresponding path program 73 times [2023-02-15 11:06:18,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:18,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348168436] [2023-02-15 11:06:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:18,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:18,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:20,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:20,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348168436] [2023-02-15 11:06:20,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348168436] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:20,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901069526] [2023-02-15 11:06:20,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:06:20,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:20,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:20,878 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:20,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2023-02-15 11:06:20,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:20,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-15 11:06:20,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:21,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:21,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 2072 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:22,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901069526] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:22,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:22,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79, 79] total 80 [2023-02-15 11:06:22,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377755337] [2023-02-15 11:06:22,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:22,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-15 11:06:22,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:22,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-15 11:06:22,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1601, Invalid=4719, Unknown=0, NotChecked=0, Total=6320 [2023-02-15 11:06:22,647 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:23,751 INFO L93 Difference]: Finished difference Result 275 states and 277 transitions. [2023-02-15 11:06:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-02-15 11:06:23,752 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2023-02-15 11:06:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:23,752 INFO L225 Difference]: With dead ends: 275 [2023-02-15 11:06:23,752 INFO L226 Difference]: Without dead ends: 157 [2023-02-15 11:06:23,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 232 SyntacticMatches, 77 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5366 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3239, Invalid=10803, Unknown=0, NotChecked=0, Total=14042 [2023-02-15 11:06:23,753 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:23,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 278 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:23,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-02-15 11:06:23,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2023-02-15 11:06:23,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0128205128205128) internal successors, (158), 156 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:23,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2023-02-15 11:06:23,777 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 155 [2023-02-15 11:06:23,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:23,777 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2023-02-15 11:06:23,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.9625) internal successors, (157), 80 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:23,777 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2023-02-15 11:06:23,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-15 11:06:23,778 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:23,778 INFO L195 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:23,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2023-02-15 11:06:23,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:23,978 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:23,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:23,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1828405368, now seen corresponding path program 74 times [2023-02-15 11:06:23,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:23,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163627656] [2023-02-15 11:06:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:23,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:25,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 703 proven. 2110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:25,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163627656] [2023-02-15 11:06:25,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163627656] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:25,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443331477] [2023-02-15 11:06:25,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:06:25,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:25,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:25,099 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:25,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2023-02-15 11:06:25,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:06:25,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:25,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-15 11:06:25,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:25,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:25,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:26,427 INFO L134 CoverageAnalysis]: Checked inductivity of 2813 backedges. 741 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:26,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443331477] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:26,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:26,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 44 [2023-02-15 11:06:26,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968728025] [2023-02-15 11:06:26,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:26,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-15 11:06:26,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:26,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-15 11:06:26,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=1064, Unknown=0, NotChecked=0, Total=1892 [2023-02-15 11:06:26,429 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:27,021 INFO L93 Difference]: Finished difference Result 168 states and 169 transitions. [2023-02-15 11:06:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-15 11:06:27,022 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 156 [2023-02-15 11:06:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:27,022 INFO L225 Difference]: With dead ends: 168 [2023-02-15 11:06:27,022 INFO L226 Difference]: Without dead ends: 166 [2023-02-15 11:06:27,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 271 SyntacticMatches, 76 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3300 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2548, Invalid=4424, Unknown=0, NotChecked=0, Total=6972 [2023-02-15 11:06:27,023 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 160 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:27,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 36 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-02-15 11:06:27,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2023-02-15 11:06:27,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:27,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2023-02-15 11:06:27,046 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 156 [2023-02-15 11:06:27,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:27,046 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2023-02-15 11:06:27,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.6363636363636362) internal successors, (160), 44 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:27,046 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2023-02-15 11:06:27,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-02-15 11:06:27,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:27,047 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:27,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2023-02-15 11:06:27,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-02-15 11:06:27,247 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:27,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:27,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1244249935, now seen corresponding path program 75 times [2023-02-15 11:06:27,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:27,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407944662] [2023-02-15 11:06:27,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:27,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:29,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:29,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407944662] [2023-02-15 11:06:29,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407944662] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:29,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751534689] [2023-02-15 11:06:29,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:06:29,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:29,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:29,314 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:29,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2023-02-15 11:06:29,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2023-02-15 11:06:29,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:29,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-15 11:06:29,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:29,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:31,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 2185 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:31,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751534689] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:31,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:31,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81, 81] total 82 [2023-02-15 11:06:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163182320] [2023-02-15 11:06:31,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-02-15 11:06:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-02-15 11:06:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1682, Invalid=4960, Unknown=0, NotChecked=0, Total=6642 [2023-02-15 11:06:31,203 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 82 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 82 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:32,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:32,352 INFO L93 Difference]: Finished difference Result 282 states and 284 transitions. [2023-02-15 11:06:32,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-02-15 11:06:32,352 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 82 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2023-02-15 11:06:32,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:32,353 INFO L225 Difference]: With dead ends: 282 [2023-02-15 11:06:32,353 INFO L226 Difference]: Without dead ends: 161 [2023-02-15 11:06:32,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 238 SyntacticMatches, 79 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5644 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3402, Invalid=11360, Unknown=0, NotChecked=0, Total=14762 [2023-02-15 11:06:32,354 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:32,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 284 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-02-15 11:06:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2023-02-15 11:06:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 162 transitions. [2023-02-15 11:06:32,382 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 162 transitions. Word has length 159 [2023-02-15 11:06:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:32,382 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 162 transitions. [2023-02-15 11:06:32,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 82 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 162 transitions. [2023-02-15 11:06:32,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2023-02-15 11:06:32,383 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:32,383 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:32,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2023-02-15 11:06:32,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-02-15 11:06:32,589 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:32,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:32,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1376953836, now seen corresponding path program 76 times [2023-02-15 11:06:32,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:32,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871353725] [2023-02-15 11:06:32,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:32,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 741 proven. 2224 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:33,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:33,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871353725] [2023-02-15 11:06:33,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871353725] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:33,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119850189] [2023-02-15 11:06:33,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:06:33,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:33,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:33,772 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:33,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2023-02-15 11:06:33,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:06:33,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:33,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-15 11:06:33,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:34,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:35,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2965 backedges. 780 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:35,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119850189] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:35,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:35,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 45 [2023-02-15 11:06:35,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895227614] [2023-02-15 11:06:35,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:35,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-02-15 11:06:35,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:35,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-02-15 11:06:35,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=869, Invalid=1111, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 11:06:35,170 INFO L87 Difference]: Start difference. First operand 161 states and 162 transitions. Second operand has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:35,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:35,779 INFO L93 Difference]: Finished difference Result 172 states and 173 transitions. [2023-02-15 11:06:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-15 11:06:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2023-02-15 11:06:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:35,780 INFO L225 Difference]: With dead ends: 172 [2023-02-15 11:06:35,780 INFO L226 Difference]: Without dead ends: 170 [2023-02-15 11:06:35,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 278 SyntacticMatches, 78 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3465 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2673, Invalid=4637, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 11:06:35,781 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 166 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:35,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 38 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:35,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-02-15 11:06:35,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2023-02-15 11:06:35,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:35,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2023-02-15 11:06:35,807 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 160 [2023-02-15 11:06:35,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:35,807 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2023-02-15 11:06:35,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.6444444444444444) internal successors, (164), 45 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2023-02-15 11:06:35,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-02-15 11:06:35,808 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:35,808 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:35,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2023-02-15 11:06:36,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:36,014 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:36,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:36,015 INFO L85 PathProgramCache]: Analyzing trace with hash -396095539, now seen corresponding path program 77 times [2023-02-15 11:06:36,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:36,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73533944] [2023-02-15 11:06:36,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:36,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:38,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:38,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73533944] [2023-02-15 11:06:38,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73533944] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:38,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722862029] [2023-02-15 11:06:38,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:06:38,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:38,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:38,189 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:38,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2023-02-15 11:06:38,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2023-02-15 11:06:38,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:38,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-15 11:06:38,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:38,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 2301 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:40,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722862029] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:40,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:40,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 84 [2023-02-15 11:06:40,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671987674] [2023-02-15 11:06:40,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:40,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-02-15 11:06:40,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:40,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-02-15 11:06:40,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1765, Invalid=5207, Unknown=0, NotChecked=0, Total=6972 [2023-02-15 11:06:40,176 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:41,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:41,359 INFO L93 Difference]: Finished difference Result 289 states and 291 transitions. [2023-02-15 11:06:41,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-15 11:06:41,359 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2023-02-15 11:06:41,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:41,360 INFO L225 Difference]: With dead ends: 289 [2023-02-15 11:06:41,360 INFO L226 Difference]: Without dead ends: 165 [2023-02-15 11:06:41,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 244 SyntacticMatches, 81 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5929 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=3569, Invalid=11931, Unknown=0, NotChecked=0, Total=15500 [2023-02-15 11:06:41,361 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:41,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 268 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:41,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-02-15 11:06:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2023-02-15 11:06:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:41,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2023-02-15 11:06:41,390 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 163 [2023-02-15 11:06:41,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:41,390 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2023-02-15 11:06:41,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 84 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2023-02-15 11:06:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2023-02-15 11:06:41,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:41,391 INFO L195 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:41,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2023-02-15 11:06:41,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:41,591 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:41,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:41,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1725603960, now seen corresponding path program 78 times [2023-02-15 11:06:41,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:41,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887494949] [2023-02-15 11:06:41,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:41,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 780 proven. 2341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:42,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:42,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887494949] [2023-02-15 11:06:42,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887494949] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:42,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889361291] [2023-02-15 11:06:42,859 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:06:42,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:42,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:42,860 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:42,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2023-02-15 11:06:43,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2023-02-15 11:06:43,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:43,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-15 11:06:43,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:43,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 3121 backedges. 820 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:44,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889361291] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:44,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:44,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 46 [2023-02-15 11:06:44,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115195274] [2023-02-15 11:06:44,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:44,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-15 11:06:44,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:44,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-15 11:06:44,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2023-02-15 11:06:44,368 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:45,007 INFO L93 Difference]: Finished difference Result 176 states and 177 transitions. [2023-02-15 11:06:45,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-15 11:06:45,007 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 164 [2023-02-15 11:06:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:45,008 INFO L225 Difference]: With dead ends: 176 [2023-02-15 11:06:45,008 INFO L226 Difference]: Without dead ends: 174 [2023-02-15 11:06:45,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 285 SyntacticMatches, 80 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3634 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2801, Invalid=4855, Unknown=0, NotChecked=0, Total=7656 [2023-02-15 11:06:45,008 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 90 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:45,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 35 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:45,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-15 11:06:45,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 168. [2023-02-15 11:06:45,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2023-02-15 11:06:45,034 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 164 [2023-02-15 11:06:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:45,034 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2023-02-15 11:06:45,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.652173913043478) internal successors, (168), 46 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2023-02-15 11:06:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-02-15 11:06:45,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:45,035 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 40, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:45,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2023-02-15 11:06:45,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2023-02-15 11:06:45,235 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:45,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:45,236 INFO L85 PathProgramCache]: Analyzing trace with hash -999186255, now seen corresponding path program 79 times [2023-02-15 11:06:45,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:45,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143786392] [2023-02-15 11:06:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:45,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:47,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:47,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143786392] [2023-02-15 11:06:47,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143786392] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:47,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514283550] [2023-02-15 11:06:47,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:06:47,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:47,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:47,517 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:47,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2023-02-15 11:06:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:47,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-15 11:06:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:47,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:49,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 2420 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:49,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514283550] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:49,548 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:49,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 86 [2023-02-15 11:06:49,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855378612] [2023-02-15 11:06:49,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:49,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-02-15 11:06:49,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:49,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-02-15 11:06:49,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1850, Invalid=5460, Unknown=0, NotChecked=0, Total=7310 [2023-02-15 11:06:49,549 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:50,777 INFO L93 Difference]: Finished difference Result 296 states and 298 transitions. [2023-02-15 11:06:50,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-02-15 11:06:50,777 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2023-02-15 11:06:50,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:50,777 INFO L225 Difference]: With dead ends: 296 [2023-02-15 11:06:50,777 INFO L226 Difference]: Without dead ends: 169 [2023-02-15 11:06:50,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 250 SyntacticMatches, 83 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6221 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3740, Invalid=12516, Unknown=0, NotChecked=0, Total=16256 [2023-02-15 11:06:50,779 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:50,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 269 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 535 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-02-15 11:06:50,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2023-02-15 11:06:50,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0119047619047619) internal successors, (170), 168 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:50,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2023-02-15 11:06:50,821 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 167 [2023-02-15 11:06:50,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:50,822 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2023-02-15 11:06:50,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 86 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:50,822 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2023-02-15 11:06:50,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-02-15 11:06:50,823 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:50,823 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 40, 40, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:50,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2023-02-15 11:06:51,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:51,029 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:51,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:51,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1874945300, now seen corresponding path program 80 times [2023-02-15 11:06:51,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:51,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719856237] [2023-02-15 11:06:51,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:51,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:51,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:52,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 820 proven. 2461 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:52,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719856237] [2023-02-15 11:06:52,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719856237] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:52,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42620359] [2023-02-15 11:06:52,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:06:52,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:52,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:52,329 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:52,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2023-02-15 11:06:52,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:06:52,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 643 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-15 11:06:52,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:52,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:53,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3281 backedges. 861 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:53,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42620359] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:53,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:53,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 47 [2023-02-15 11:06:53,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048093001] [2023-02-15 11:06:53,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:53,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-15 11:06:53,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:53,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-15 11:06:53,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=954, Invalid=1208, Unknown=0, NotChecked=0, Total=2162 [2023-02-15 11:06:53,844 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:54,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:06:54,516 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2023-02-15 11:06:54,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-15 11:06:54,517 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2023-02-15 11:06:54,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:06:54,518 INFO L225 Difference]: With dead ends: 180 [2023-02-15 11:06:54,518 INFO L226 Difference]: Without dead ends: 178 [2023-02-15 11:06:54,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 292 SyntacticMatches, 82 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3807 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2932, Invalid=5078, Unknown=0, NotChecked=0, Total=8010 [2023-02-15 11:06:54,519 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 172 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:06:54,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 35 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:06:54,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-02-15 11:06:54,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 172. [2023-02-15 11:06:54,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2023-02-15 11:06:54,552 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 168 [2023-02-15 11:06:54,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:06:54,552 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2023-02-15 11:06:54,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.6595744680851063) internal successors, (172), 47 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:06:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2023-02-15 11:06:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2023-02-15 11:06:54,553 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:06:54,553 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 41, 1, 1, 1, 1, 1, 1] [2023-02-15 11:06:54,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2023-02-15 11:06:54,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:54,759 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:06:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:06:54,760 INFO L85 PathProgramCache]: Analyzing trace with hash -440927539, now seen corresponding path program 81 times [2023-02-15 11:06:54,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:06:54,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281220851] [2023-02-15 11:06:54,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:06:54,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:06:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:06:57,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:57,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:06:57,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281220851] [2023-02-15 11:06:57,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281220851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:06:57,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929345092] [2023-02-15 11:06:57,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:06:57,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:06:57,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:06:57,203 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:06:57,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2023-02-15 11:06:57,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2023-02-15 11:06:57,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:06:57,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-15 11:06:57,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:06:57,523 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:57,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:06:59,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 2542 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:06:59,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929345092] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:06:59,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:06:59,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87, 87] total 88 [2023-02-15 11:06:59,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064338232] [2023-02-15 11:06:59,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:06:59,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-02-15 11:06:59,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:06:59,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-02-15 11:06:59,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1937, Invalid=5719, Unknown=0, NotChecked=0, Total=7656 [2023-02-15 11:06:59,369 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 88 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 88 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:07:00,702 INFO L93 Difference]: Finished difference Result 303 states and 305 transitions. [2023-02-15 11:07:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-02-15 11:07:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 88 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2023-02-15 11:07:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:07:00,703 INFO L225 Difference]: With dead ends: 303 [2023-02-15 11:07:00,703 INFO L226 Difference]: Without dead ends: 173 [2023-02-15 11:07:00,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 256 SyntacticMatches, 85 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6520 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3915, Invalid=13115, Unknown=0, NotChecked=0, Total=17030 [2023-02-15 11:07:00,704 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:07:00,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 336 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:07:00,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-15 11:07:00,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2023-02-15 11:07:00,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:00,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 174 transitions. [2023-02-15 11:07:00,731 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 174 transitions. Word has length 171 [2023-02-15 11:07:00,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:07:00,731 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 174 transitions. [2023-02-15 11:07:00,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 88 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:00,731 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 174 transitions. [2023-02-15 11:07:00,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-02-15 11:07:00,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:07:00,731 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 1, 1, 1, 1, 1, 1] [2023-02-15 11:07:00,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2023-02-15 11:07:00,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2023-02-15 11:07:00,932 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:07:00,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:07:00,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1313382520, now seen corresponding path program 82 times [2023-02-15 11:07:00,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:07:00,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685223019] [2023-02-15 11:07:00,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:07:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:07:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:07:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 861 proven. 2584 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:02,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:07:02,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685223019] [2023-02-15 11:07:02,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685223019] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:07:02,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358267849] [2023-02-15 11:07:02,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:07:02,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:02,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:07:02,294 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:07:02,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2023-02-15 11:07:02,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:07:02,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:07:02,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-15 11:07:02,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:07:02,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:02,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:07:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3445 backedges. 903 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:03,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358267849] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:07:03,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:07:03,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 48 [2023-02-15 11:07:03,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706030849] [2023-02-15 11:07:03,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:07:03,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-15 11:07:03,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:07:03,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-15 11:07:03,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=998, Invalid=1258, Unknown=0, NotChecked=0, Total=2256 [2023-02-15 11:07:03,873 INFO L87 Difference]: Start difference. First operand 173 states and 174 transitions. Second operand has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:04,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:07:04,546 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2023-02-15 11:07:04,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-02-15 11:07:04,546 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2023-02-15 11:07:04,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:07:04,547 INFO L225 Difference]: With dead ends: 184 [2023-02-15 11:07:04,547 INFO L226 Difference]: Without dead ends: 182 [2023-02-15 11:07:04,547 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 299 SyntacticMatches, 84 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3984 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3066, Invalid=5306, Unknown=0, NotChecked=0, Total=8372 [2023-02-15 11:07:04,548 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 178 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:07:04,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 32 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:07:04,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-15 11:07:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 176. [2023-02-15 11:07:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2023-02-15 11:07:04,575 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 172 [2023-02-15 11:07:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:07:04,575 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2023-02-15 11:07:04,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.6666666666666665) internal successors, (176), 48 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2023-02-15 11:07:04,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-02-15 11:07:04,576 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:07:04,577 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 1, 1, 1, 1, 1, 1] [2023-02-15 11:07:04,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2023-02-15 11:07:04,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:04,783 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:07:04,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:07:04,783 INFO L85 PathProgramCache]: Analyzing trace with hash 178233521, now seen corresponding path program 83 times [2023-02-15 11:07:04,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:07:04,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109585775] [2023-02-15 11:07:04,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:07:04,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:07:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:07:07,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:07,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:07:07,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109585775] [2023-02-15 11:07:07,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109585775] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:07:07,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875167510] [2023-02-15 11:07:07,592 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:07:07,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:07,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:07:07,593 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:07:07,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2023-02-15 11:07:07,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2023-02-15 11:07:07,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:07:07,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-15 11:07:07,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:07:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:07,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:07:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 2667 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:09,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875167510] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:07:09,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:07:09,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 90 [2023-02-15 11:07:09,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747784432] [2023-02-15 11:07:09,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:07:09,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2023-02-15 11:07:09,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:07:09,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2023-02-15 11:07:09,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2026, Invalid=5984, Unknown=0, NotChecked=0, Total=8010 [2023-02-15 11:07:09,827 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 90 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 90 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:11,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:07:11,263 INFO L93 Difference]: Finished difference Result 310 states and 312 transitions. [2023-02-15 11:07:11,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-15 11:07:11,263 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 90 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2023-02-15 11:07:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:07:11,264 INFO L225 Difference]: With dead ends: 310 [2023-02-15 11:07:11,264 INFO L226 Difference]: Without dead ends: 177 [2023-02-15 11:07:11,264 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 262 SyntacticMatches, 87 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6826 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4094, Invalid=13728, Unknown=0, NotChecked=0, Total=17822 [2023-02-15 11:07:11,265 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:07:11,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 404 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:07:11,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-02-15 11:07:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2023-02-15 11:07:11,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:11,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2023-02-15 11:07:11,294 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 175 [2023-02-15 11:07:11,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:07:11,295 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2023-02-15 11:07:11,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 90 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:11,295 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2023-02-15 11:07:11,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2023-02-15 11:07:11,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:07:11,296 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 1, 1, 1, 1, 1, 1] [2023-02-15 11:07:11,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2023-02-15 11:07:11,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:11,502 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:07:11,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:07:11,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1251487724, now seen corresponding path program 84 times [2023-02-15 11:07:11,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:07:11,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622465760] [2023-02-15 11:07:11,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:07:11,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:07:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:07:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 903 proven. 2710 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:12,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:07:12,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622465760] [2023-02-15 11:07:12,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622465760] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:07:12,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907458429] [2023-02-15 11:07:12,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:07:12,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:12,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:07:12,939 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:07:12,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2023-02-15 11:07:13,080 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2023-02-15 11:07:13,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:07:13,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-15 11:07:13,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:07:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:13,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:07:14,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3613 backedges. 946 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:14,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907458429] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:07:14,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:07:14,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 49 [2023-02-15 11:07:14,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522209234] [2023-02-15 11:07:14,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:07:14,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 11:07:14,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:07:14,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 11:07:14,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1043, Invalid=1309, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 11:07:14,598 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:07:15,357 INFO L93 Difference]: Finished difference Result 188 states and 189 transitions. [2023-02-15 11:07:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-02-15 11:07:15,358 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 176 [2023-02-15 11:07:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:07:15,359 INFO L225 Difference]: With dead ends: 188 [2023-02-15 11:07:15,359 INFO L226 Difference]: Without dead ends: 186 [2023-02-15 11:07:15,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 306 SyntacticMatches, 86 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4165 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3203, Invalid=5539, Unknown=0, NotChecked=0, Total=8742 [2023-02-15 11:07:15,360 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 180 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:07:15,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 38 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:07:15,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-15 11:07:15,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 180. [2023-02-15 11:07:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:15,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2023-02-15 11:07:15,394 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2023-02-15 11:07:15,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:07:15,394 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2023-02-15 11:07:15,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.673469387755102) internal successors, (180), 49 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:15,395 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2023-02-15 11:07:15,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-02-15 11:07:15,395 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:07:15,396 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 43, 1, 1, 1, 1, 1, 1] [2023-02-15 11:07:15,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2023-02-15 11:07:15,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:15,602 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:07:15,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:07:15,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1535490611, now seen corresponding path program 85 times [2023-02-15 11:07:15,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:07:15,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237248414] [2023-02-15 11:07:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:07:15,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:07:15,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:07:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:07:18,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237248414] [2023-02-15 11:07:18,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237248414] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:07:18,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295931293] [2023-02-15 11:07:18,239 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:07:18,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:18,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:07:18,240 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:07:18,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2023-02-15 11:07:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:07:18,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-15 11:07:18,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:07:18,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:18,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:07:20,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 2795 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:20,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295931293] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:07:20,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:07:20,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 92 [2023-02-15 11:07:20,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403491005] [2023-02-15 11:07:20,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:07:20,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-02-15 11:07:20,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:07:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-02-15 11:07:20,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=6255, Unknown=0, NotChecked=0, Total=8372 [2023-02-15 11:07:20,508 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 92 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 92 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:07:22,080 INFO L93 Difference]: Finished difference Result 317 states and 319 transitions. [2023-02-15 11:07:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-02-15 11:07:22,081 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 92 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2023-02-15 11:07:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:07:22,081 INFO L225 Difference]: With dead ends: 317 [2023-02-15 11:07:22,081 INFO L226 Difference]: Without dead ends: 181 [2023-02-15 11:07:22,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 268 SyntacticMatches, 89 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4277, Invalid=14355, Unknown=0, NotChecked=0, Total=18632 [2023-02-15 11:07:22,082 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 9 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:07:22,082 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 499 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:07:22,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-15 11:07:22,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-02-15 11:07:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.011111111111111) internal successors, (182), 180 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:22,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2023-02-15 11:07:22,126 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 179 [2023-02-15 11:07:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:07:22,126 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2023-02-15 11:07:22,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 92 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2023-02-15 11:07:22,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-02-15 11:07:22,127 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:07:22,128 INFO L195 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 1, 1, 1, 1, 1, 1] [2023-02-15 11:07:22,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2023-02-15 11:07:22,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:22,333 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:07:22,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:07:22,334 INFO L85 PathProgramCache]: Analyzing trace with hash 181583752, now seen corresponding path program 86 times [2023-02-15 11:07:22,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:07:22,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177323659] [2023-02-15 11:07:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:07:22,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:07:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:07:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 946 proven. 2839 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:23,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:07:23,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177323659] [2023-02-15 11:07:23,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177323659] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:07:23,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625512019] [2023-02-15 11:07:23,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:07:23,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:23,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:07:23,834 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:07:23,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2023-02-15 11:07:23,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:07:23,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:07:23,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 94 conjunts are in the unsatisfiable core [2023-02-15 11:07:23,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:07:24,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:24,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:07:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3785 backedges. 990 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:25,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625512019] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:07:25,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:07:25,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 50 [2023-02-15 11:07:25,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681389540] [2023-02-15 11:07:25,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:07:25,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-15 11:07:25,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:07:25,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-15 11:07:25,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1089, Invalid=1361, Unknown=0, NotChecked=0, Total=2450 [2023-02-15 11:07:25,515 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:26,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:07:26,270 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2023-02-15 11:07:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-15 11:07:26,270 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2023-02-15 11:07:26,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:07:26,271 INFO L225 Difference]: With dead ends: 192 [2023-02-15 11:07:26,271 INFO L226 Difference]: Without dead ends: 190 [2023-02-15 11:07:26,272 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 313 SyntacticMatches, 88 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4350 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3343, Invalid=5777, Unknown=0, NotChecked=0, Total=9120 [2023-02-15 11:07:26,272 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:07:26,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 34 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:07:26,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-15 11:07:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 184. [2023-02-15 11:07:26,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:26,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2023-02-15 11:07:26,306 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 180 [2023-02-15 11:07:26,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:07:26,306 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2023-02-15 11:07:26,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.68) internal successors, (184), 50 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:26,306 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2023-02-15 11:07:26,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 11:07:26,307 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:07:26,307 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 1, 1, 1, 1, 1, 1] [2023-02-15 11:07:26,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2023-02-15 11:07:26,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:26,513 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:07:26,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:07:26,513 INFO L85 PathProgramCache]: Analyzing trace with hash -2092416847, now seen corresponding path program 87 times [2023-02-15 11:07:26,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:07:26,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988914869] [2023-02-15 11:07:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:07:26,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:07:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:07:29,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:29,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:07:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988914869] [2023-02-15 11:07:29,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988914869] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:07:29,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284667439] [2023-02-15 11:07:29,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:07:29,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:29,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:07:29,264 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:07:29,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2023-02-15 11:07:29,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2023-02-15 11:07:29,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:07:29,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-15 11:07:29,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:07:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:29,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:07:31,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 2926 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:31,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284667439] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:07:31,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:07:31,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93, 93] total 94 [2023-02-15 11:07:31,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265499437] [2023-02-15 11:07:31,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:07:31,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-02-15 11:07:31,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:07:31,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-02-15 11:07:31,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2210, Invalid=6532, Unknown=0, NotChecked=0, Total=8742 [2023-02-15 11:07:31,681 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 94 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 94 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:33,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:07:33,203 INFO L93 Difference]: Finished difference Result 324 states and 326 transitions. [2023-02-15 11:07:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-02-15 11:07:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 94 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2023-02-15 11:07:33,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:07:33,205 INFO L225 Difference]: With dead ends: 324 [2023-02-15 11:07:33,205 INFO L226 Difference]: Without dead ends: 185 [2023-02-15 11:07:33,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 274 SyntacticMatches, 91 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7459 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4464, Invalid=14996, Unknown=0, NotChecked=0, Total=19460 [2023-02-15 11:07:33,207 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 9 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:07:33,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 410 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:07:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-02-15 11:07:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2023-02-15 11:07:33,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 186 transitions. [2023-02-15 11:07:33,249 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 186 transitions. Word has length 183 [2023-02-15 11:07:33,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:07:33,249 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 186 transitions. [2023-02-15 11:07:33,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 94 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:33,249 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 186 transitions. [2023-02-15 11:07:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2023-02-15 11:07:33,250 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:07:33,250 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 44, 44, 1, 1, 1, 1, 1, 1] [2023-02-15 11:07:33,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2023-02-15 11:07:33,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2023-02-15 11:07:33,451 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:07:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:07:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1324915476, now seen corresponding path program 88 times [2023-02-15 11:07:33,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:07:33,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357151267] [2023-02-15 11:07:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:07:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:07:33,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:07:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 990 proven. 2971 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:35,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:07:35,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357151267] [2023-02-15 11:07:35,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357151267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:07:35,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320889566] [2023-02-15 11:07:35,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:07:35,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:35,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:07:35,044 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:07:35,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2023-02-15 11:07:35,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:07:35,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:07:35,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-15 11:07:35,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:07:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:35,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:07:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3961 backedges. 1035 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:36,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320889566] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:07:36,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:07:36,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 51 [2023-02-15 11:07:36,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31274327] [2023-02-15 11:07:36,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:07:36,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 11:07:36,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:07:36,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 11:07:36,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1136, Invalid=1414, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 11:07:36,815 INFO L87 Difference]: Start difference. First operand 185 states and 186 transitions. Second operand has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:37,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:07:37,587 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2023-02-15 11:07:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-02-15 11:07:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2023-02-15 11:07:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:07:37,588 INFO L225 Difference]: With dead ends: 196 [2023-02-15 11:07:37,588 INFO L226 Difference]: Without dead ends: 194 [2023-02-15 11:07:37,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 320 SyntacticMatches, 90 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4539 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3486, Invalid=6020, Unknown=0, NotChecked=0, Total=9506 [2023-02-15 11:07:37,589 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:07:37,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 41 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:07:37,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-02-15 11:07:37,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 188. [2023-02-15 11:07:37,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:37,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2023-02-15 11:07:37,629 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 184 [2023-02-15 11:07:37,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:07:37,629 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2023-02-15 11:07:37,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.6862745098039214) internal successors, (188), 51 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:37,629 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2023-02-15 11:07:37,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-02-15 11:07:37,630 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:07:37,630 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 45, 1, 1, 1, 1, 1, 1] [2023-02-15 11:07:37,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2023-02-15 11:07:37,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2023-02-15 11:07:37,831 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:07:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:07:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash 197325005, now seen corresponding path program 89 times [2023-02-15 11:07:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:07:37,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429589422] [2023-02-15 11:07:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:07:37,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:07:37,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:07:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:40,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:07:40,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429589422] [2023-02-15 11:07:40,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429589422] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:07:40,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013483674] [2023-02-15 11:07:40,753 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:07:40,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:07:40,754 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:07:40,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2023-02-15 11:07:40,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2023-02-15 11:07:40,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:07:40,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 94 conjunts are in the unsatisfiable core [2023-02-15 11:07:40,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:07:41,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:41,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:07:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 3060 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:43,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013483674] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:07:43,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:07:43,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 96 [2023-02-15 11:07:43,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673830414] [2023-02-15 11:07:43,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:07:43,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-02-15 11:07:43,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:07:43,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-02-15 11:07:43,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2305, Invalid=6815, Unknown=0, NotChecked=0, Total=9120 [2023-02-15 11:07:43,263 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:44,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:07:44,868 INFO L93 Difference]: Finished difference Result 331 states and 333 transitions. [2023-02-15 11:07:44,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-02-15 11:07:44,868 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2023-02-15 11:07:44,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:07:44,869 INFO L225 Difference]: With dead ends: 331 [2023-02-15 11:07:44,869 INFO L226 Difference]: Without dead ends: 189 [2023-02-15 11:07:44,870 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 280 SyntacticMatches, 93 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7786 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4655, Invalid=15651, Unknown=0, NotChecked=0, Total=20306 [2023-02-15 11:07:44,870 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:07:44,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 451 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:07:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-02-15 11:07:44,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2023-02-15 11:07:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2023-02-15 11:07:44,900 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 187 [2023-02-15 11:07:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:07:44,900 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2023-02-15 11:07:44,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.96875) internal successors, (189), 96 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:07:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2023-02-15 11:07:44,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-02-15 11:07:44,901 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:07:44,902 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 45, 45, 1, 1, 1, 1, 1, 1] [2023-02-15 11:07:44,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2023-02-15 11:07:45,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:45,108 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:07:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:07:45,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1083146120, now seen corresponding path program 90 times [2023-02-15 11:07:45,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:07:45,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846081909] [2023-02-15 11:07:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:07:45,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:07:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:07:46,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1035 proven. 3106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:46,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:07:46,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846081909] [2023-02-15 11:07:46,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846081909] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:07:46,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512496406] [2023-02-15 11:07:46,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:07:46,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:07:46,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:07:46,780 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:07:46,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2023-02-15 11:07:46,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2023-02-15 11:07:46,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:07:46,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-15 11:07:46,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:07:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 4141 backedges. 1081 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:07:47,141 INFO L328 TraceCheckSpWp]: Computing backward predicates...